Countersunk Washers

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Countersunk washers are used with oval and flat head screws to provide a bearing surface and sealing functionality. Raptor Supplies offers a wide range of countersunk washers from brands...Read more

StyleModelFor Screw SizeOverall HeightOutside Dia.Countersink AngleHeight ToleranceHardnessColorPrice (ex. VAT)Pkg. Qty.
AZ9930#81/8"3/4"82°-0.01" to +0.01"Rockwell C40Black€29.505
AZ9931#81/8"1"82°-0.01" to +0.01"Rockwell C40Black€36.705
AZ9932#100.14"13/16"82°-0.01" to +0.01"Rockwell C40Black€42.835
AZ9933#100.14"1 1/8"82°-0.01" to +0.01"Rockwell C40Black€11.171
AZ9934#100.14"1 1/4"82°-0.01" to +0.01"Rockwell C40Black€12.761
AZ99391/4"0.281"2"82°-0.01" to +0.01"Rockwell C40Black€42.331
AZ99351/4"0.281"1 1/4"82°-0.01" to +0.01"Rockwell C40Black€13.191
AZ99381/4"0.281"1 3/4"82°-0.01" to +0.01"Rockwell C40Black€20.421
AZ99371/4"0.281"1 1/2"82°-0.01" to +0.01"Rockwell C40Black€14.761
AZ99361/4"0.281"1 3/8"82°-0.01" to +0.01"Rockwell C40Black€15.071
AZ9921M43 mm20 mm90°-0.3 mm to +0.3 mmRockwell C40Black€27.715
AZ9920M43 mm16 mm90°-0.3 mm to +0.3 mmRockwell C40Black€27.135
AZ9924M53.5 mm28 mm90°-0.3 mm to +0.3 mmRockwell C40Black€9.721
AZ9922M53.5 mm22 mm90°-0.3 mm to +0.3 mmRockwell C40Black€37.795
AZ9923M53.5 mm25 mm90°-0.3 mm to +0.3 mmRockwell C40Black€53.425
AZ9926M64 mm36 mm90°-0.3 mm to +0.3 mmRockwell C40Black€15.921
AZ9927M65 mm40 mm90°-0.3 mm to +0.3 mmRockwell C40Black€18.081
AZ9928M66 mm45 mm90°-0.3 mm to +0.3 mmRockwell C40Black€22.161
AZ9925M64 mm32 mm90°-0.3 mm to +0.3 mmRockwell C40Black€15.261
AZ9929M66 mm52 mm90°-0.3 mm to +0.3 mmRockwell C40Black€32.751
APPROVED VENDOR -

Plain Grade 18-8 Stainless Steel Countersunk Washers

StyleModelFor Screw SizeOverall HeightOutside Dia.Countersink AngleHeight ToleranceHardnessColorTensile StrengthPrice (ex. VAT)Pkg. Qty.
AU51350.013.0001#60.078"29/64"82°+0.043"Rockwell B70Silver-€11.64100
BZ9931SS#81/8"1"82°-0.01" to +0.01"Rockwell B85-B95-90000 psi€17.701
CU51350.016.0001#80.094"33/64"82°+0.038"Rockwell B70Silver-€11.80100
DZ9930SS#81/8"3/4"82°-0.01" to +0.01"Rockwell B85-B95-90000 psi€13.151
EZ9932SS#100.14"13/16"82°-0.01" to +0.01"Rockwell B85-B95-90000 psi€19.671
FZ9933SS#100.14"1 1/8"82°-0.01" to +0.01"Rockwell B85-B95-90000 psi€32.421
GZ9934SS#100.14"1 1/4"82°-0.01" to +0.01"Rockwell B85-B95-90000 psi€28.011
HU51350.019.0001#100.109"19/32"82°+0.05"Rockwell B70Silver-€15.63100
IU51350.021.0001#120.265"11/16"82°-0.139"Rockwell B70Silver-€20.28100
JZ9938SS1/4"0.281"1 3/4"82°-0.01" to +0.01"Rockwell B85-B95-90000 psi€65.131
KZ9937SS1/4"0.281"1 1/2"82°-0.01" to +0.01"Rockwell B85-B95-90000 psi€44.811
LZ9936SS1/4"0.281"1 3/8"82°-0.01" to +0.01"Rockwell B85-B95-90000 psi€45.901
MZ9939SS1/4"0.281"2"82°-0.01" to +0.01"Rockwell B85-B95-90000 psi€103.031
NU51350.025.00011/4"0.156"25/32"82°-0.005" to +0.014"Rockwell B70Silver-€25.16100
OZ9935SS1/4"0.281"1 1/4"82°-0.01" to +0.01"Rockwell B85-B95-90000 psi€32.351
PFINWX00300-010P1M31.8 mm10 mm90°----€14.5210
PFINWX00400-010P1M42.3 mm14 mm90°----€18.8810
PFINWX00500-005P1M52.8 mm16 mm90°----€27.895
PFINWX00600-005P1M63.3 mm18 mm90°----€13.195
MICRO PLASTICS -

Plain Grade 6/6 Nylon Countersunk Washers

StyleModelFor Screw SizeOverall HeightOutside Dia.ColorCountersink AngleHeight ToleranceTemp. RangePrice (ex. VAT)Pkg. Qty.
A11SFW0006B#60.1"7/16"Black82°-0.005" to +0.005"-40°F€8.8720
B11SFW0008B#80.115"33/64"Black82°-0.005" to +0.005"-40°F€23.6720
C11SFW0008#80.115"33/64"Off White82°-0.005" to +0.005"-40°F€7.9920
D11SFW0010#100.152"37/64"Off White82°-0.005" to +0.005"-40°F€9.3920
E11SFW0012#124/25"39/64"Off White82°-0.005" to +0.005"-40°F€24.5520
GRAINGER -

Plain Grade 316 Stainless Steel Countersunk Washers

StyleModelFor Screw SizeOutside Dia.Overall HeightCountersink AngleHeight ToleranceHardnessColorTensile StrengthPrice (ex. VAT)
AZPYR#10625-316#105/8"1/8"82°-0.01" to +0.01"Rockwell B85-B95Silver75000 psi€12.28
BZPYR14750-3161/4"3/4"1/8"82°-0.01" to +0.01"Rockwell B85-B95Silver75000 psi€13.19
APPROVED VENDOR -

Countersunk Washer, 8 For Screw Size, Steel, 17/32 In O.D., 0.109 In Overall Ht., 100PK

ModelItemPrice (ex. VAT)
FINWIS0-85-100PAB9HNJ€6.31

Countersunk Washers

Countersunk washers are used with oval and flat head screws to provide a bearing surface and sealing functionality. Raptor Supplies offers a wide range of countersunk washers from brands like Grainger and Micro-Plastics. These washers work similar to flat washers, but feature a bearing surface for flat head screws.

Frequently Asked Questions

How do countersunk washers provide better protection against vibrations than flat washers?

  • When installed, these countersunk washers push against the object for resisting vibrations.
  • They essentially act as springs. Driving a threaded fastener through the centre will force the washer's sides to collapse, thus pushing against the object.

What are finishing countersunk washers?

  • Finishing countersunk washers are also known as dress washers.
  • These washers are machined to be sturdier and provide a better appearance than standard countersunk washers.
  • Oval and flat head screws sit flush within these countersunk washers.

What are countersunk external-tooth lock washers?

These washers feature teeth that firmly grip heads of 82-degree flat head countersunk screws, preventing joints from loosening due to vibration.

What is the significance of countersunk tight-grip external-tooth lock washers?

The teeth on these washers bite deeper into the screw head & joint than normal external-tooth lock washers. They provide a solid hold, preventing 90-degree countersunk screws from loosening due to vibrations.

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