How to install a lock washer?

Place the lock washer between the threaded fastener (like a nut) and the screw / bolt head. Make sure that the lock washer press against the fastener & other adjacent surfaces and forms a tight connection. Press the fastener down to lock the grooves of a tooth lock washer with the grooves of the nut. Use a wrench or ratchet to tighten the nut or threaded fastener. Make sure that the teeth of the tooth lock washer are covered completely by the nut / fastener head, or that the split lock washer is slightly out of alignment to indicate tension on the threaded fastener. Users may loosen the nut / threaded fastener to adjust the washer if it is not operating correctly.

How to remove a lock washer?

After the operation is completed, the washer can be removed by simply removing the nut / threaded fastener that is holding the washer in place using a vise-grip or pipe wrench. Use a flat screwdriver to pry the lock washer off. When removing a split washer, the screwdriver head should be placed inside the split or beneath the washer and pushed. When removing a washer having teeth, the screwdriver head should be placed under a tooth and pushed up, repeating the procedure with more teeth if required. For other lock washer types, the screwdriver head can be placed below the washer and pushed up. The washer may break during removal, depending on the amount of pressure being applied. If the lock washer does not budge, use penetrating oil and repeat the previous step. Some lock washers can be used multiple times easily. Other washers (split lock) can be used only 1 or 2 times. Users should not reuse a split lock washer or other damaged washers. Do not use old washers in high-stress joint applications.

What is the difference between lock washers and flat washers?

Flat washers are suitable for increasing the surface area and distributing the applied force when tightening the fastener. They can be used on the fastener's bolt & nut sides, or used as spacers where using a bolt may not be suitable. Lock washers create tension during tightening to prevent the loosening of nuts. They are generally used on the fastener's nut side for applications involving vibrations.

Which type of lock washers has the highest vibration resistance?

Split Lock, Tooth Lock, Diamond-Coated Lock, Spring Lock and Wedge Lock type lock washers have vibration resistance in ascending or increasing order.

Lock Washers

-

Plain Steel Internal Tooth Lock Washers

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Class	Color	Price (ex. VAT)	Pkg. Qty.
A	B37320.050.0001	#4	0.512"	22/25"	-	0.055"	-	-	€3,912.98	6750
B	B37320.025.0001	#6	0.256"	1/2"	-	0.035"	-	-	€8,415.00	37000
C	B37320.062.0001	#6	16/25"	1.1"	-	0.059"	-	-	€12,945.83	5000
D	B37320.031.0001	#8	8/25"	0.59"	-	1/25"	-	-	€8,242.25	17200
E	B37320.037.0001	#10	0.384"	0.7"	-	0.042"	-	-	€8,419.81	13150
C	B37320.075.0001	#10	0.768"	1 6/25"	-	0.071"	-	-	€13,388.91	2970
F	U37320.050.0001	1/2"	0.512"	22/25"	Rockwell C40-C50	0.055"	Not Applicable	-	€22.28	25
G	U37320.025.0001	1/4"	0.256"	1/2"	Rockwell C40-C50	0.035"	Not Applicable	-	€30.64	100
H	U37320.075.0001	3/4"	0.768"	1 6/25"	Rockwell C40-C50	0.071"	Not Applicable	-	€64.10	10
I	U37320.037.0001	3/8"	0.384"	1.7"	Rockwell C40-C50	0.042"	Not Applicable	-	€45.79	50
J	U37320.062.0001	5/8"	16/25"	1.1"	Rockwell C40-C50	0.059"	Not Applicable	-	€36.84	10
K	U37320.031.0001	5/16"	8/25"	0.59"	Rockwell C40-C50	1/25"	Not Applicable	-	€68.16	100
C	L37320.030.0001	M3	3.2 mm	6 mm	-	0.4 mm	-	Silver	€4,834.92	90000
L	L37320.040.0001	M4	4.3 mm	8 mm	-	0.5 mm	-	Silver	€2,222.72	50000
M	L37320.050.0001	M5	5.3 mm	10 mm	-	0.6 mm	-	Silver	€3,190.73	50000
N	L37320.060.0001	M6	6.4 mm	11 mm	-	0.7 mm	-	Silver	€2,147.47	40000
O	L37320.080.0001	M8	8.4 mm	15 mm	-	0.8 mm	-	Silver	€1,571.59	18100
P	L37320.100.0001	M10	10.5 mm	18 mm	-	0.9 mm	-	Silver	€2,084.80	11100
Q	M37320.120.0001	M12	13 mm	20.5 mm	Rockwell C35-C42	1 mm	Not Applicable	-	€17.15	50

-

Plain Silicon Bronze Split Lock Washers

A

B

C

D

E

F

G

H

I

J

K

L

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Thickness Tolerance	Class	Hardness	Price (ex. VAT)	Pkg. Qty.
A	1NU87	#4	3/25"	0.209"	0.025"	+0.025"	Not Applicable	Rockwell B90	€6.48	100
B	B43150.025.0001	#4	0.252"	0.487"	1/16"	-	-	-	€2,593.74	9300
C	B43150.037.0001	#6	0.377"	17/25"	3/32"	-	-	-	€2,177.80	3400
D	1NU88	#6	0.148"	1/4"	0.031"	+0.031"	Not Applicable	Rockwell B90	€9.81	100
E	U43150.013.0001	#6	0.141"	1/4"	0.031"	Not Rated	-	Rockwell B90	€9.73	100
F	B43150.019.0001	#8	0.193"	0.334"	0.047"	-	-	-	€5,707.25	30300
E	U43150.016.0001	#8	0.167"	0.293"	1/25"	-	-	Rockwell B90	€19.59	100
G	B43150.050.0001	#8	0.502"	0.869"	1/8"	-	-	-	€3,950.84	1650
H	B43150.062.0001	#10	0.628"	1.073"	0.156"	-	-	-	€4,329.83	900
I	U43150.019.0001	#10	0.193"	0.334"	0.047"	-	Not Applicable	Rockwell B90	€52.97	100
J	B43150.021.0001	#10	0.22"	0.377"	0.056"	-	-	-	€7,063.75	16600
E	U43150.021.0001	#12	0.22"	0.377"	0.056"	-	Not Applicable	Rockwell B90	€48.33	100
E	U43150.050.0001	1/2"	0.502"	0.869"	1/8"	-	Not Applicable	Rockwell B90	€58.73	25
E	U43150.025.0001	1/4"	0.252"	0.487"	1/16"	-	Not Applicable	Rockwell B90	€93.83	100
K	U43150.037.0001	3/8"	0.377"	17/25"	3/32"	-	Not Applicable	Rockwell B90	€97.10	50
L	U43150.075.0001	5/8"	0.766"	1.265"	0.156"	+0.188"	Not Applicable	Rockwell B90	€50.42	10
E	U43150.062.0001	5/8"	0.628"	1.073"	0.156"	-	Not Applicable	Rockwell B90	€68.07	10
E	U43150.031.0001	5/16"	0.314"	0.583"	0.0781"	-	-	Rockwell B90	€72.16	100

APPROVED VENDOR -

Zinc Plated Grade 1050-1065 Spring Steel Split Lock Washers

A

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Thickness Tolerance	Class	Hardness	Price (ex. VAT)	Pkg. Qty.
A	LWIS-100-100P	#10	1/5"	0.334"	0.047"	0.047" to 0.062"	Not Applicable	Rockwell C38-C46	€1.91	100
A	LWIS0250-100P	1/4"	0.26"	0.487"	1/16"	0.062" to 0.109"	Not Applicable	Rockwell C38-C46	€2.10	100
A	LWIS0370-100P	3/8"	0.385"	17/25"	3/32"	0.094" to 0.141"	Not Applicable	Rockwell C38-C46	€5.07	100

-

Plain Grade 316 Stainless Steel Split Lock Washers

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Thickness Tolerance	Class	Hardness	Thread Direction	Price (ex. VAT)	Pkg. Qty.
A	U55450.008.0001	#2	0.088"	0.172"	0.02"	-	Not Applicable	-	-	€1.56	50
B	U55450.011.0001	#4	0.114"	0.209"	0.025"	0.025"	Not Applicable	-	-	€5.87	50
C	U55450.013.0001	#6	0.141"	1/4"	0.031"	0.031"	Not Applicable	-	-	€5.58	50
D	U55450.016.0001	#8	0.174"	0.293"	1/25"	0.04"	Not Applicable	-	-	€6.80	50
E	U55450.019.0001	#10	0.193"	0.334"	0.047"	0.047"	Not Applicable	-	-	€7.85	50
F	U55450.021.0001	#12	0.22"	0.377"	0.056"	-	Not Applicable	-	-	€20.34	50
G	U55450.150.0001	1 1/2"	1.504"	2.419"	3/8"	-	Not Applicable	Rockwell C35	-	€123.79	5
H	U55450.125.0001	1 1/4"	1.254"	2.036"	0.312"	-	Not Applicable	-	-	€70.40	5
I	U55450.112.0001	1 1/8"	1.129"	1.847"	0.281"	-	Not Applicable	-	-	€33.28	5
J	U55450.100.0001	1"	1.003"	1.656"	1/4"	-	Not Applicable	Rockwell C35	-	€29.29	5
K	1NY79	1"	1.024"	1.656"	1/4"	-	Not Applicable	Rockwell C35	-	€33.99	5
L	U55450.050.0001	1/2"	0.502"	0.869"	1/8"	-	Not Applicable	-	-	€7.75	10
M	U55450.025.0001	1/4"	0.252"	0.487"	1/16"	-	Not Applicable	-	-	€4.51	50
N	U55450.075.0001	3/4"	0.753"	1.265"	3/16"	-	Not Applicable	-	-	€7.46	5
O	WSHR,LOCK 3/8 SS6	3/8"	-	-	-	-	-	-	Right Hand	-	1	RFQ
P	U55450.037.0001	3/8"	0.377"	17/25"	3/32"	-	Not Applicable	-	-	€15.77	50
Q	U55450.062.0001	5/8"	0.628"	1.073"	0.156"	-	Not Applicable	-	-	€7.68	10
R	U55450.031.0001	5/16"	0.314"	0.583"	0.0781"	-	Not Applicable	-	-	€11.04	50
S	1NY78	7/8"	0.894"	1.459"	0.219"	-	Not Applicable	Rockwell C35	-	€42.70	10
T	U55450.087.0001	7/8"	0.878"	1.459"	0.219"	-	Not Applicable	Rockwell C35	-	€17.83	5
U	U55450.043.0001	7/16"	11/25"	0.77"	0.109"	-	Not Applicable	-	-	€11.15	25
V	U55450.056.0001	9/16"	0.564"	0.965"	0.141"	-	-	-	-	€32.97	10

APPROVED VENDOR -

Zinc Plated Grade 2 Steel Split Lock Washers

A

B

C

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Thickness Tolerance	Class	Price (ex. VAT)	Pkg. Qty.
A	U37183.019.0001	#10	0.193"	0.35"	Rockwell C38	0.056"	0.056"	Not Applicable	€6.15	100
B	U37183.112.0001	1 1/8"	1.129"	1.903"	Rockwell C38	0.345"	0.345"	Not Applicable	€60.98	5
C	U37020.137.0001	1 3/8"	1.379"	2.219"	Rockwell C38-C46	0.344"	-	Not Applicable	€57.63	5

-

Delta Protect Steel Wedge Lock Washers

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Thickness Tolerance	Color	Price (ex. VAT)	Pkg. Qty.
A	1206	#5	0.13"	7/25"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€227.01	200
B	1512	#5	0.13"	7/25"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€29.20	20
C	1513	#6	0.15"	0.3"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€28.83	20
D	1208	#6	0.15"	0.35"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€242.84	200
E	1514	#6	0.15"	0.35"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€28.83	20
F	1207	#6	0.15"	0.3"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€240.49	200
G	1516	#8	0.17"	0.35"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€29.20	20
H	1209	#8	0.17"	0.3"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€187.45	200
I	1515	#8	0.17"	0.3"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€29.20	20
J	1212	#8	0.17"	0.35"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€243.94	200
K	1517	#10	0.21"	0.35"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€28.79	20
L	1518	#10	0.21"	0.43"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€29.20	20
M	1218	#10	0.21"	0.43"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€243.99	200
N	1213	#10	0.21"	0.35"	Rockwell C46	0.071"	-0.01" to +0.01"	Silver	€187.45	200
O	2806	1 1/2"	1.59"	2.3"	Rockwell C46	0.26"	-0.02" to +0.02"	Silver	€556.83	25
P	GDP-113	1 1/2"	1.523"	2.196"	Rockwell C40-C55	0.256"	-	Silver	€394.80	25
Q	1558	1 1/2"	1.59"	2.3"	Rockwell C46	0.26"	-0.02" to +0.02"	Silver	€25.87	1
R	GDP-112	1 1/4"	1.275"	1 7/8"	Rockwell C40-C55	0.265"	-	Silver	€258.10	25
S	2717	1 1/4"	1.35"	1.91"	Rockwell C46	0.26"	-0.02" to +0.02"	Silver	€409.98	25
T	1554	1 1/4"	1.35"	1.91"	Rockwell C46	0.23"	-0.02" to +0.02"	Silver	€20.29	1
U	1555	1 1/4"	1.35"	2.3"	Rockwell C46	0.26"	-0.02" to +0.02"	Silver	€25.87	1
V	2742	1 1/4"	1.35"	2.3"	-	0.26"	-0.02" to +0.02"	Silver	€556.13	25
W	1553	1 1/8"	1 6/25"	2.3"	Rockwell C46	0.26"	-0.02" to +0.02"	Silver	€25.87	1
X	GDP-111	1 1/8"	1.14"	1.715"	Rockwell C40-C55	0.256"	-	Silver	€220.85	25
Y	2724	1 1/8"	1 6/25"	2.3"	Rockwell C46	0.26"	-0.02" to +0.02"	Silver	€556.83	25

FABORY -

Plain Grade A2 Stainless Steel Serrated External Tooth Lock Washers

A

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Color	Type	Material	Grade	Price (ex. VAT)	Pkg. Qty.
A	M51460.025.0001	M2.5	2.7 mm	5.5 mm	0.4 mm	Silver	Serrated External Tooth Lock	Stainless Steel	Grade A2	€5.65	50
A	M51460.140.0001	M14	15 mm	24 mm	1 mm	Silver	Serrated External Tooth Lock	Stainless Steel	Grade A2	€6.05	25
A	M51460.220.0001	M22	23 mm	36 mm	1.5 mm	Silver	Serrated External Tooth Lock	Stainless Steel	Grade A2	€4.51	5

FABORY -

Galvanized Spring Steel Split Lock Washers

A

B

C

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Color	Finish	Type	Material	Price (ex. VAT)	Pkg. Qty.
A	M37025.060.0001	M6	6.1 mm	11.8 mm	1.6 mm	Silver	Hot Dipped Galvanized	Split Lock	Spring Steel	€11.72	100
A	M37025.080.0001	M8	8.1 mm	14.8 mm	2 mm	Silver	Hot Dipped Galvanized	Split Lock	Spring Steel	€16.65	100
B	L37025.080.0001	M8	8.1 mm	14.8 mm	2 mm	Gray	Galvanized	Split Lock	Spring Steel	€719.74	6300
A	M37025.100.0001	M10	10.2 mm	18.1 mm	2.2 mm	Silver	Hot Dipped Galvanized	Split Lock	Spring Steel	€82.75	100
A	M37025.120.0001	M12	12.2 mm	21.1 mm	2.5 mm	Silver	Hot Dipped Galvanized	Split Lock	Spring Steel	€31.51	100
B	L37025.160.0001	M16	16.2 mm	27.4 mm	3.5 mm	Gray	Galvanized	Split Lock	Spring Steel	€604.43	1150
A	M37025.160.0001	M16	16.2 mm	27.4 mm	3.5 mm	Silver	Hot Dipped Galvanized	Split Lock	Spring Steel	€37.58	50
A	M37025.180.0001	M18	18.2 mm	29.4 mm	3.5 mm	Silver	Hot Dipped Galvanized	Split Lock	Spring Steel	€56.10	50
A	M37025.200.0001	M20	20.2 mm	33.6 mm	4 mm	Silver	Hot Dipped Galvanized	Split Lock	Spring Steel	€59.49	50
A	M37025.220.0001	M22	22.5 mm	35.9 mm	4 mm	Silver	Hot Dipped Galvanized	Split Lock	Spring Steel	€60.22	25
A	M37025.240.0001	M24	24.5 mm	40 mm	5 mm	Silver	Hot Dipped Galvanized	Split Lock	Spring Steel	€41.10	25
A	M37025.270.0001	M27	27.5 mm	43 mm	5 mm	Silver	Hot Dipped Galvanized	Split Lock	Spring Steel	€33.71	10
A	M37025.300.0001	M30	30.5 mm	48.2 mm	6 mm	Silver	Hot Dipped Galvanized	Split Lock	Spring Steel	€47.11	5
C	L37025.300.0001	M30	30.5 mm	48.2 mm	6 mm	Gray	Galvanized	Split Lock	Spring Steel	€1,096.65	220

DISC-LOCK -

Plain Stainless Steel Wedge Lock Washers

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Hardness	Color	Type	Material	Price (ex. VAT)	Pkg. Qty.
A	SSG-110	1"	10.015"	10.626"	6/25"	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€618.92	50
B	SSG-105	1/2"	0.51"	0.937"	0.136"	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€519.08	100
C	SSG-101	1/4"	0.262"	0.495"	0.101"	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€551.50	200
D	SSG-108	3/4"	0.82"	10.381"	0.183"	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€1,084.46	100
E	SSG-103	3/8"	0.409"	0.705"	0.135"	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€721.45	200
F	SSP-100	3/16"	0.203"	0.401"	2/25"	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€528.22	200
G	SSM-100	5 mm	5.15 mm	10.2 mm	2.03 mm	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€529.61	200
H	SSG-107	5/8"	0.651"	10.247"	0.134"	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€715.97	100
I	SSG-102	5/16"	0.326"	0.628"	0.119"	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€559.28	200
J	SSM-101	6 mm	6.66 mm	12.6 mm	2.56 mm	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€529.61	200
K	SSG-109	7/8"	0.883"	10.47"	6/25"	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€509.15	50
L	SSG-104	7/16"	0.45"	22/25"	0.135"	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€891.47	200
M	SSM-102	8 mm	8.28 mm	16 mm	3.02 mm	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€541.09	200
N	SSG-106	9/16"	0.572"	10.128"	0.127"	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€678.17	100
O	SSM-103	10 mm	10.38 mm	17.9 mm	3.4 mm	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€618.59	200
P	SSM-104	11 mm	11.43 mm	22.4 mm	3.33 mm	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€902.79	200
Q	SSM-105	12 mm	12.95 mm	23.8 mm	3.45 mm	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€482.51	100
R	SSM-106	14 mm	14.53 mm	28.7 mm	3.23 mm	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€596.53	100
S	SSM-107	16 mm	16.53 mm	31.7 mm	3.4 mm	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€656.70	100
T	SSM-108	20 mm	20.82 mm	35.1 mm	4.65 mm	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€926.91	100
U	SSM-109	22 mm	22.44 mm	37.3 mm	6.1 mm	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€509.15	50
V	SSM-110	24 mm	25.78 mm	41.3 mm	6.1 mm	Rockwell C25	Silver	Wedge Lock	Stainless Steel	€618.92	50

-

Plain Grade A4 Stainless Steel Split Lock Washers

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Thickness Tolerance	Class	Hardness	Color	Price (ex. VAT)	Pkg. Qty.
A	M55450.020.0001	M2	2.1 mm	4.4 mm	0.5 mm	-	Not Applicable	-	-	€3.50	50
B	M55450.025.0001	M2.5	2.6 mm	5.1 mm	0.6 mm	-	Not Applicable	-	-	€3.29	50
C	M55450.030.0001	M3	3.1 mm	6.2 mm	0.8 mm	-	Not Applicable	-	-	€6.72	50
D	LW7XX00350-100P1	M3.5	3.6 mm	6.7 mm	0.8 mm	-0.1 mm to +0.1 mm	Not Applicable	-	-	€8.45	100
E	M55450.040.0001	M4	4.1 mm	7.6 mm	0.9 mm	-	Not Applicable	-	-	€4.61	50
F	M55390.050.0001	M5	5.1 mm	8.8 mm	1.6 mm	-	Not Applicable	Rockwell C38-C46	-	€6.14	50
G	M55450.050.0001	M5	5.1 mm	9.2 mm	1.2 mm	-	Not Applicable	-	-	€8.47	50
H	M55450.060.0001	M6	6.1 mm	11.8 mm	1.6 mm	-	Not Applicable	-	-	€6.28	50
I	M55390.060.0001	M6	6.1 mm	9.9 mm	1.6 mm	-	Not Applicable	Rockwell C38-C46	-	€6.35	50
J	M55450.080.0001	M8	8.1 mm	14.8 mm	2 mm	-0.1 mm to +0.1 mm	Not Applicable	-	-	€6.05	50
K	M55390.080.0001	M8	8.1 mm	12.7 mm	2 mm	-	Not Applicable	Rockwell C38-C46	-	€5.19	50
L	M55450.100.0001	M10	10.2 mm	18.1 mm	2.2 mm	-	Not Applicable	-	-	€9.98	50
F	M55390.100.0001	M10	10.2 mm	16 mm	2.5 mm	-	Not Applicable	Rockwell C38-C46	-	€12.41	50
M	M55390.120.0001	M12	12.2 mm	18 mm	2.5 mm	-	-	-	Silver	€13.83	50
N	M55450.120.0001	M12	12.2 mm	21.1 mm	2.5 mm	-	Not Applicable	-	-	€6.85	25
O	M55450.140.0001	M14	14.2 mm	24.1 mm	3 mm	-0.15 mm to +0.15 mm	Not Applicable	-	-	€14.32	25
P	M55450.160.0001	M16	16.2 mm	27.4 mm	3.5 mm	-	Not Applicable	-	-	€6.88	10
Q	M55450.180.0001	M18	18.2 mm	29.4 mm	3.5 mm	-	Not Applicable	-	-	€9.11	10
R	M55450.200.0001	M20	20.2 mm	33.6 mm	4 mm	-	Not Applicable	-	-	€6.40	5
S	M55450.220.0001	M22	22.5 mm	35.9 mm	4 mm	-	Not Applicable	Rockwell C38-C46	-	€12.91	5
O	M55450.240.0001	M24	24.5 mm	40 mm	5 mm	-0.2 mm to +0.2 mm	Not Applicable	-	-	€13.75	5

-

Zinc Plated Steel Internal and External Tooth Lock Washers

A

B

C

D

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Class	Hardness	Type	Material	Price (ex. VAT)	Pkg. Qty.
A	B37590.050.0001	#4	0.512"	1.38"	0.052"	-	-	Internal And External Tooth Lock	Steel	€3,607.72	6750
B	B37590.037.0001	#12	0.384"	1 1/8"	0.042"	-	-	Internal And External Tooth Lock	Steel	€3,245.22	13150
C	U37590.050.0001	1/2"	0.512"	1.38"	0.052"	Not Applicable	Rockwell C40-C50	Internal And External Tooth Lock	Steel	€14.69	25
D	U37590.037.0001	3/8"	0.384"	1 1/8"	0.042"	Not Applicable	Rockwell C40-C50	Internal And External Tooth Lock	Steel	€13.49	50

APPROVED VENDOR -

Plain Grade 410 Stainless Steel External Tooth Lock Washers

A

B

C

D

E

F

G

H

I

J

K

L

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Thickness Tolerance	Class	Color	Price (ex. VAT)	Pkg. Qty.
A	1NY46	#4	0.123"	0.26"	Rockwell C40	0.018"	0.012" to 0.018"	Not Applicable	Silver	€6.76	100
B	U53460.011.0001	#4	0.115"	0.245"	Rockwell C40-C50	0.012"	0.012" to 0.018"	Not Applicable	-	€2.79	50
C	U53460.013.0001	#6	0.141"	0.305"	Rockwell C40	0.016"	0.016" to 0.022"	Not Applicable	-	€2.35	50
D	U53460.016.0001	#8	0.168"	0.365"	Rockwell C40	0.018"	-	Not Applicable	-	€3.67	50
E	U53460.019.0001	#10	0.195"	0.395"	Rockwell C40	0.018 ft.	-	Not Applicable	-	€5.28	50
F	U53460.050.0001	1/2"	0.513"	22/25"	Rockwell C40	0.037"	-	Not Applicable	-	€4.24	10
G	U53460.025.0001	1/4"	0.256"	0.494"	Rockwell C40	0.023"	0.023" to 0.028"	Not Applicable	-	€11.91	50
H	U53460.075.0001	3/4"	0.768"	1.22"	Rockwell C40	0.047"	-	Not Applicable	-	€7.09	5
I	U53460.037.0001	3/8"	0.398"	0.694"	Rockwell C40	1/25"	0.032" to 0.04"	Not Applicable	Silver	€17.94	50
J	U53460.062.0001	5/8"	0.641"	1.045"	Rockwell C40	0.042"	-	Not Applicable	-	€18.03	10
K	U53460.031.0001	5/16"	8/25"	0.588"	Rockwell C40	0.028"	-	Not Applicable	-	€10.20	50
L	U53460.043.0001	7/16"	0.448"	0.74"	Rockwell C40	0.032"	0.032" to 0.04"	Not Applicable	-	€13.13	25

-

Zinc Plated Steel Countersunk External Tooth Lock Washers

A

B

C

D

E

F

G

H

I

J

K

L

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Class	Type	Material	Grade	Price (ex. VAT)	Pkg. Qty.
A	B37500.037.0001	#4	0.383"	0.765"	0.028"	-	Countersunk External Tooth Lock	Steel	-	€3,169.62	13150
B	B37500.016.0001	#4	0.167"	0.322"	0.017"	-	Countersunk External Tooth Lock	Steel	-	€2,209.90	50000
C	B37500.019.0001	#6	0.195"	0.354"	0.02"	-	Countersunk External Tooth Lock	Steel	-	€2,669.21	50000
D	U37500.013.0001	#6	0.14"	0.289"	0.017"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	€8.92	100
E	U37500.016.0001	#8	0.167"	0.322"	-	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	€6.78	100
F	B37500.021.0001	#8	0.22"	0.421"	0.02"	-	Countersunk External Tooth Lock	Steel	-	€3,579.02	31200
G	U37500.019.0001	#10	0.195"	0.354"	0.02"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	€8.24	100
H	B37500.025.0001	#10	0.255"	0.454"	0.02"	-	Countersunk External Tooth Lock	Steel	-	€1,801.06	29400
I	U37500.021.0001	#12	0.22"	0.421"	0.02"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	€17.61	100
J	U37500.025.0001	1/4"	0.255"	0.454"	0.02"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	€9.41	100
K	U37500.037.0001	3/8"	0.383"	0.765"	0.028"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	€18.59	50
L	U37500.031.0001	5/16"	0.318"	0.599"	0.023"	Not Applicable	Countersunk External Tooth Lock	Steel	Non Graded	€16.68	100

APPROVED VENDOR -

Plain Grade 410 Stainless Steel Countersunk External Tooth Lock Washers

A

B

C

D

E

F

G

H

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Class	Type	Material	Grade	Price (ex. VAT)	Pkg. Qty.
A	U51501.008.0001	#2	-	-	-	Not Applicable	Countersunk External Tooth Lock	Stainless Steel	Grade 410	€10.49	50
B	U51501.011.0001	#4	0.113"	0.213"	0.015"	Not Applicable	Countersunk External Tooth Lock	Stainless Steel	Grade 410	€41.63	50
C	U51501.013.0001	#6	0.14"	0.289"	0.017"	Not Applicable	Countersunk External Tooth Lock	Stainless Steel	Grade 410	€17.90	50
D	U51501.016.0001	#8	0.167"	0.322"	0.017"	Not Applicable	Countersunk External Tooth Lock	Stainless Steel	Grade 410	€18.64	50
E	U51501.019.0001	#10	0.195"	0.354"	0.02"	Not Applicable	Countersunk External Tooth Lock	Stainless Steel	Grade 410	€26.23	50
F	U51501.025.0001	1/4"	0.255"	0.454"	0.02"	Not Applicable	Countersunk External Tooth Lock	Stainless Steel	Grade 410	€35.49	50
G	U51501.037.0001	3/8"	0.383"	0.765"	0.028"	Not Applicable	Countersunk External Tooth Lock	Stainless Steel	Grade 410	€181.18	50
H	U51501.031.0001	5/16"	0.318"	0.599"	0.023"	Not Applicable	Countersunk External Tooth Lock	Stainless Steel	Grade 410	€165.92	50

-

Zinc Plated Steel Split Lock Washers

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Color	Thickness Tolerance	Class	Price (ex. VAT)	Pkg. Qty.
A	U37020.008.0001	#2	0.088"	0.172"	Rockwell C40-C50	0.02"	-	-	Not Applicable	€4.45	100
B	B37183.125.0001	#2	1.254"	2.104"	-	0.384"	-	-	-	€403.26	110
C	U37020.009.0001	#3	0.101"	0.195"	Rockwell C40-C50	0.025"	-	-	Not Applicable	€4.36	100
D	B37171.011.0001	#3	0.114"	0.253"	-	0.034"	-	-	-	€7,788.42	90000
E	B37171.037.0001	#3	0.377"	0.738"	-	0.123"	-	-	-	€1,148.77	3100
F	U37183.009.0001	#3	0.101"	0.209"	Rockwell C40-C50	0.031"	-	-	Not Applicable	€22.65	100
G	B37183.137.0001	#4	1.379"	2.301"	-	0.422"	-	-	-	€1,134.39	80
H	B37171.075.0001	#4	0.753"	1.355"	-	0.241"	-	-	-	€2,521.21	500
I	U37183.011.0001	#4	0.114"	0.223"	-	0.031"	-	-	Not Applicable	€6.18	100
J	B37171.150.0001	#4	1.504"	2.627"	-	0.496"	-	-	-	€1,234.48	70
K	LWLIS0-40USA-100BX	#4	0.114"	0.199"	Rockwell C38-C46	0.02"	Silver	+0.006"	Not Applicable	€2.92	100
L	U37171.011.0001	#4	0.114"	0.253"	Rockwell C40-C50	0.034"	-	-	Not Applicable	€9.89	100
M	U37020.011.0001	#4	0.114"	0.209"	Rockwell C38	0.025"	-	-0.005" to +0.005"	Not Applicable	€2.19	100
D	B37171.013.0001	#4	0.141"	0.314"	-	0.045"	-	-	-	€4,272.96	50000
N	B37171.087.0001	#5	0.878"	1.571"	-	0.285"	-	-	-	€1,241.46	320
O	U37020.012.0001	#5	0.127"	0.236"	Rockwell C40-C50	0.031"	-	-	Not Applicable	€2.92	100
P	U37183.012.0001	#5	0.127"	0.252"	Rockwell C40-C50	1/25"	-	-	Not Applicable	€7.89	100
Q	U37171.013.0001	#6	0.141"	0.314"	Rockwell C40-C50	0.045"	-	-	Not Applicable	€9.36	100
R	U37183.013.0001	#6	0.141"	0.266"	Rockwell C40-C50	1/25"	-	-	Not Applicable	€8.25	100
S	LWLIS0-60USA-100BX	#6	0.141"	0.236"	Rockwell C38-C46	0.025"	Silver	+0.006"	Not Applicable	€2.61	100
T	B37171.100.0001	#6	1.003"	1.794"	-	0.33"	-	-	-	€800.12	220
U	B37171.016.0001	#6	0.167"	3/8"	-	0.057"	-	-	-	€6,219.23	41600
V	B37183.150.0001	#6	1.504"	2.491"	-	0.458"	-	-	-	€1,180.07	65
W	U37020.013.0001	#6	0.148"	1/4"	Rockwell C38-C46	0.031"	-	-0.005" to +0.005"	Not Applicable	€2.07	100
X	U37020.016.0001	#8	0.174"	0.293"	Rockwell C38-C46	1/25"	-	-0.005" to +0.005"	Not Applicable	€2.10	100

APPROVED VENDOR -

Grade 2 Steel Split Lock Washers

A

B

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Class	Color	Price (ex. VAT)	Pkg. Qty.
A	U37060.125.0001	1 1/4"	1.254"	2.036"	Rockwell C38	0.312"	Not Applicable	Silver	€9.86	5
B	U37025.031.0001	5/16"	0.322"	0.583"	Rockwell C38-C46	0.0781"	Not Applicable	-	€7.96	100

FABORY -

Plain Spring Steel Split Lock Washers

A

B

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Color	Type	Material	Finish	Price (ex. VAT)	Pkg. Qty.
A	M37200.180.0001	M18	18.2 mm	26.4 mm	3.5 mm	Silver	Split Lock	Spring Steel	Plain	€7.19	10
A	M37200.220.0001	M22	22.5 mm	32.9 mm	4.5 mm	Silver	Split Lock	Spring Steel	Plain	€14.37	10
A	M37200.270.0001	M27	27.5 mm	38.9 mm	5 mm	Silver	Split Lock	Spring Steel	Plain	€21.27	10
A	M37200.360.0001	M36	36.5 mm	52.2 mm	7 mm	Silver	Split Lock	Spring Steel	Plain	€21.23	5
B	M37000.390.0001	M39	39.5 mm	61.2 mm	6 mm	Silver	Split Lock	Spring Steel	Plain	€14.40	2
B	M37000.450.0001	M45	45.5 mm	71.2 mm	7 mm	Silver	Split Lock	Spring Steel	Plain	€20.39	2
B	M37000.520.0001	M52	53 mm	83 mm	8 mm	Silver	Split Lock	Spring Steel	Plain	€38.74	2
B	M37000.560.0001	M56	57 mm	87 mm	8 mm	Silver	Split Lock	Spring Steel	Plain	€38.53	1

SUPER-STRUT -

Gold Galvanized Steel Split Lock Washers

A

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Type	Material	Finish
A	E1481/2	1/2"	1/2"	-	-	Split Lock	Steel	Gold Galvanized	RFQ
A	E148-1/4	1/4"	0.26"	0.487"	1/16"	Split Lock	Steel	Gold Galvanized	RFQ
A	E1483/8	3/8"	3/8"	-	-	Split Lock	Steel	Gold Galvanized	RFQ
A	E148-5/8	5/8"	0.641"	1.073"	0.156"	Split Lock	Steel	Gold Galvanized	RFQ
A	E148-5/16	5/16"	0.325"	0.586"	0.0781"	Split Lock	Steel	Gold Galvanized	RFQ

APPROVED VENDOR -

Plain Grade 410 Stainless Steel Internal Tooth Lock Washers

A

B

C

D

E

F

G

H

I

J

K

L

M

N

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Thickness Tolerance	Class	Hardness	Price (ex. VAT)	Pkg. Qty.
A	U53462.008.0001	#2	0.089"	0.172"	0.01"	-	Not Applicable	Rockwell C40	€5.07	50
B	U53462.009.0001	#3	0.102"	0.215"	0.01"	-	Not Applicable	Rockwell C40	€4.20	50
C	U53462.011.0001	#4	0.115"	0.245"	0.012"	0.012" to 0.018"	Not Applicable	Rockwell C40	€3.45	50
D	U53462.013.0001	#6	0.141"	0.275"	0.016"	0.016" to 0.022"	Not Applicable	Rockwell C40	€7.01	50
E	U53462.016.0001	#8	0.168"	0.325"	0.018"	0.018" to 0.023"	Not Applicable	Rockwell C40	€10.67	50
F	U53462.019.0001	#10	0.195"	0.365"	0.018"	0.018" to 0.024"	Not Applicable	Rockwell C40	€4.49	50
G	U53462.021.0001	#12	0.221"	0.394"	0.02"	0.02" to 0.027"	Not Applicable	Rockwell C40	€5.23	50
H	U53462.050.0001	1/2"	0.512"	0.867"	0.037"	-0.004" to +0.004"	Not Applicable	Rockwell C40	€4.14	10
I	U53462.025.0001	1/4"	0.256"	0.46"	0.023"	-	Not Applicable	Rockwell C40	€6.14	50
J	U53462.075.0001	3/4"	0.769"	1.22"	0.047"	-0.004" to +0.004"	Not Applicable	Rockwell C40	€5.62	5
K	U53462.037.0001	3/8"	0.384"	0.67"	0.032"	-	Not Applicable	Rockwell C40	€15.83	50
L	U53462.062.0001	5/8"	16/25"	1.045"	0.042"	-0.004" to +0.004"	Not Applicable	Rockwell C40	€32.01	10
M	U53462.031.0001	5/16"	8/25"	0.594"	0.028"	-	Not Applicable	Rockwell C40	€11.67	50
N	U53462.043.0001	7/16"	0.448"	0.74"	0.032"	-	Not Applicable	Rockwell C40	€16.41	25

ARMOR COAT -

Armor Coat Steel Split Lock Washers

A

B

C

D

E

F

G

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Hardness	Color	Thickness Tolerance	Price (ex. VAT)	Pkg. Qty.
A	UST236050	1/2"	0.512"	0.879"	1/8"	Rockwell C33-C39	Silver	-0.006" to +0.006"	€11.63	25
B	UST236046	1/4"	0.26"	0.489"	1/16"	Rockwell C33-C39	Silver	-0.006" to +0.006"	€9.37	100
C	UST236052	3/4"	0.766"	1.285"	3/16"	Rockwell C33-C39	Silver	-0.006" to +0.006"	€22.64	20
D	UST236048	3/8"	0.385"	11/16"	3/32"	Rockwell C33-C39	Silver	-0.006" to +0.006"	€11.50	50
E	UST236051	5/8"	0.641"	1.087"	0.156"	Rockwell C33-C39	Silver	-0.006" to +0.006"	€22.99	25
F	UST236047	5/16"	0.322"	0.593"	0.0781"	Rockwell C33-C39	Silver	-0.006" to +0.006"	€5.41	50
G	UST236049	7/16"	0.45"	0.784"	0.109"	Rockwell C33-C39	Silver	-0.006" to +0.006"	€8.71	25

APPROVED VENDOR -

Plain Grade 18-8 Stainless Steel Internal Tooth Lock Washers

A

B

C

D

E

F

G

H

I

J

K

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Hardness	Thickness	Thickness Tolerance	Class	Price (ex. VAT)	Pkg. Qty.
A	U51462.011.0001	#4	0.115"	0.245"	Rockwell C45-C50	0.012"	0.012" to 0.018"	Not Applicable	€7.80	50
B	U51462.013.0001	#6	0.141"	0.275"	Rockwell C45-C50	0.016"	0.016" to 0.022"	Not Applicable	€6.03	50
C	U51462.016.0001	#8	0.168"	0.325"	Rockwell C45-C50	0.018"	0.018" to 0.023"	Not Applicable	€18.93	50
D	U51462.019.0001	#10	0.195"	0.365"	Rockwell C45-C50	0.018"	0.018" to 0.024"	Not Applicable	€9.42	50
E	U51462.050.0001	1/2"	0.512"	0.867"	Rockwell C45-C50	0.037"	0.037" to 0.045"	Not Applicable	€17.74	10
F	U51462.025.0001	1/4"	0.256"	0.46"	Rockwell C20-C45	0.023"	0.023" to 0.028"	Not Applicable	€15.81	50
G	U51462.075.0001	3/4"	0.769"	1.22"	Rockwell C45-C50	0.047"	0.047" to 0.055"	Not Applicable	€23.35	5
H	U51462.037.0001	3/8"	0.384"	0.67"	-	0.032"	-	Not Applicable	€38.35	50
I	U51462.062.0001	5/8"	-	1.045"	Rockwell C20-C45	0.042"	0.042" to 0.05"	Not Applicable	€27.89	10
J	U51462.031.0001	5/16"	8/25"	0.594"	Rockwell C20-C45	0.028"	-	Not Applicable	€26.48	50
K	U51462.056.0001	9/16"	0.576"	0.957"	Rockwell C45-C50	0.037"	0.037" to 0.045"	Not Applicable	€27.71	10

Strictly Necessary Cookies

Advertising

Recommendations

Functionality

Analytics

Categories

Brands

Lock Washers

Plain Steel Internal Tooth Lock Washers

Plain Silicon Bronze Split Lock Washers

Zinc Plated Grade 1050-1065 Spring Steel Split Lock Washers

Plain Grade 316 Stainless Steel Split Lock Washers

Zinc Plated Grade 2 Steel Split Lock Washers

Delta Protect Steel Wedge Lock Washers

Plain Grade A2 Stainless Steel Serrated External Tooth Lock Washers

Galvanized Spring Steel Split Lock Washers

Plain Stainless Steel Wedge Lock Washers

Plain Grade A4 Stainless Steel Split Lock Washers

Zinc Plated Steel Internal and External Tooth Lock Washers

Plain Grade 410 Stainless Steel External Tooth Lock Washers

Zinc Plated Steel Countersunk External Tooth Lock Washers

Plain Grade 410 Stainless Steel Countersunk External Tooth Lock Washers

Zinc Plated Steel Split Lock Washers

Grade 2 Steel Split Lock Washers

Plain Spring Steel Split Lock Washers

Gold Galvanized Steel Split Lock Washers

Plain Grade 410 Stainless Steel Internal Tooth Lock Washers

Armor Coat Steel Split Lock Washers

Plain Grade 18-8 Stainless Steel Internal Tooth Lock Washers

Lock Washers

Frequently Asked Questions

We are here to help!

Looking for a part not listed here?

Popular Search Queries

Explore More

Select your cookie preferences

Strictly Necessary Cookies

Advertising

Recommendations

Functionality

Analytics

Categories

Brands

Lock Washers

Lock Washers

Frequently Asked Questions

How to install a lock washer?

How to remove a lock washer?

What is the difference between lock washers and flat washers?

Which type of lock washers has the highest vibration resistance?

We are here to help!

Looking for a part not listed here?

Popular Search Queries

Explore More