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5/16 Flat Washers (ASME B18. 22.1)

Flat Washers, or just Plain Washers, are a flat annulus or ring, often of metal, used to spread the load from the head of a screwed fastening to the base material. Flat washers are used to increase the bearing surface of a nut or fastener's head thus spreading the clamping force over a larger area.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
Irwin IndOntFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16ms15795-812 flat washers milspec 18.8 stainless steel b18.22.1696
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Irwin IndOntFlat WasherSteelPlain5/16ms9321-11 5/16 flatwasher stainless stl b18.22.196
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Irwin IndOntFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 flatwasher st/st 316 .343 x .750 x .050 b18.22.11000
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Irwin IndOntFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 flat washer st/st 7/8 od x .062 thick b18.22.1500
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Irwin IndOntFlat WasherNylon (Polyamide)Plain5/16 x 3/4 x .0625/16 x 3/4 x .062 flatwasher nylon b18.22.12284
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 0.3285/16 flat 0.328x0.562x0.063 18-8 s/s b18.22.1 () () ()3504
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 flat 18-8 s/s ms-813 b18.22.1 () () ()10238
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 flat 18-8 s/s ms-812 b18.22.1 () () ()7901
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GLFOHFlat Washer316, 317, A4 StainlessPlain5/16 x 0.3455/16 flat 0.345x0.750x0.045 316 s/s b18.22.1 () () ()2334
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 7/8 x 0.045/16x7/8x0.04 flat 18-8 s/s b18.22.1 () () ()9821
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x .755/16x.75 flat 18-8 s/s b18.22.1 () () ()3758
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 flat 18-8 s/s domestic b18.22.1 () () ()40
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GLFOHFlat Washer316, 317, A4 StainlessPlain5/16 x .755/16x.75 flat 316 s/s b18.22.1 () () ()1400
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated5/165/16 (.344x.688x.065) ss flat/ 304ss MS15795-812 b18.22.1 () () ()3308
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated5/165/16 (.375x.875x.080) ss flat/ 304ss MS15795-813 b18.22.1 () () ()1109
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GLFOHFlat WasherSteelCadmium/Yellow5/165/16 (.344x.688x.065) steel flat cad/ MS27183-12 b18.22.1 () () ()1408
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GLFOHFlat WasherSteelPlain5/16 x 3/4 x 1/165/16x3/4x1/16 flat cpr b18.22.1 () () ()150
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GLFOHFlat Washer316, 317, A4 StainlessPlain5/165/16 flat 316 s/s domestic b18.22.1 () () ()810
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GLFOHFlat WasherAluminumPlain5/16AN960-JD516L b18.22.1 () () ()3750
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Irwin IndOntFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 flatwashers stainless steel b18.22.185
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AbabaCAFlat WasherSteelPlain5/165/16 reg series f/w steel yel plt (9/16 od) b18.22.14100
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AbabaCAFlat WasherSteelPlain5/165/16 lite series f/w steel yel plt (9/16 od) b18.22.1604
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AbabaCAFlat WasherSteelTin Plated5/165/16 reg series f/w brass tin plt b18.22.1500
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AbabaCAFlat WasherNylon (Polyamide)Plain5/16 x 1 x 1/85/16 x 1 flat washer .125 thk nylon b18.22.1625
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AbabaCAFlat WasherNylon (Polyamide)Plain5/16 x 1 1/85/16 x 1 1/8 flat washer .032 thk nylon b18.22.12550
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AbabaCAFlat WasherNylon (Polyamide)Plain5/16 x 1/25/16 x 1/2 f/w .032 thk nylon b18.22.16533
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AbabaCAFlat WasherNylon (Polyamide)Plain5/16 x 1/25/16 x 1/2 f/w .062 thk nylon b18.22.130
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AbabaCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x .5315/16 x .531 flat wsh s/s b18.22.122213
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AbabaCAFlat WasherSteelNickel Plated5/16 x 9/165/16 x 9/16 flat washer .062 thk stl nkl b18.22.11000
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AbabaCAFlat WasherRubber, Buna-N, Neoprene etc.Plain5/16 x 11/165/16 x 11/16 solid neoprene wsh 3/32 thk b18.22.1702
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AbabaCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 11/165/16 x 11/16 f/w s/s b18.22.12788
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AbabaCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Black Oxide5/16 x 11/165/16 x 11/16 flat washer s/s blk ox wax b18.22.1200
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AbabaCAFlat Washer316, 317, A4 StainlessPlain5/16 x 3/45/16 x 3/4 f/w 316 s/s b18.22.1200
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AbabaCAFlat WasherNylon (Polyamide)Plain5/16 x 3/45/16 x 3/4 flat wsh .040 thk nylon b18.22.12230
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AbabaCAFlat WasherNylon (Polyamide)Plain5/16 x 3/45/16 x 3/4 f/w .062 thk nylon b18.22.110016
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AbabaCAFlat WasherNylon (Polyamide)Plain5/16 x 3/45/16 x 3/4 f/w .062 thk black nylon b18.22.12336
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AbabaCAFlat WasherNylon (Polyamide)Plain5/16 x 3/4 x 1/85/16 x 3/4 f/w .125 thk nylon b18.22.15171
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AbabaCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 3/45/16 x 3/4 f/w s/s b18.22.119464
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AbabaCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 3/45/16 x 3/4 f/w 25/pkg s/s b18.22.19
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AbabaCAFlat Washer316, 317, A4 StainlessPlain5/16 x 7/85/16 x 7/8 f/w 316 s/s b18.22.1646
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SIIINFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 18-8 stainless steel large od flat washer) b18.22.1325
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QFCTXFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/165/16 flat type-a wide 18-8 304 domestic b18.22.13
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QFCTXFlat WasherBrassPlain5/16 idx1/2 thickx.031 brass b18.22.13000
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QFCTXFlat WasherSteelZinc/Clear5/165/16 type-b narrow flat trivalent b18.22.113330
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QFCTXFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated5/16(5/16).375x.875x.064-.104 flat 18-8 304ss MS15795-813 b18.22.1200
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QFCTXFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated5/16(5/16).375x.875x.064-.104 flat 18-8 304ss MS15795-813 b18.22.1140
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QFCTXFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 1 3/165/16x1 3/16 s/s backed neo 16ga b18.22.1200
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QFCTXFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x .3435/16 .343x.750x.050 flat 18-8! b18.22.1208
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QFCTXFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x .3435/16 .343x.750x.050 flat 18-8! b18.22.12500
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B & K FASTPAFlat WasherBrassPlain5/16 x 5 x .6225/16 x 5/8 flat washers brass .345 x .622 x .071 b18.22.1235
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B & K FASTPAFlat WasherCopperPlain5/16 x 9/16 x 1/325/16 x 9/16 x 1/32 copper flat washers b18.22.125
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B & K FASTPAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 5/85/16 x 5/8 od flat washers stainless 18-8 b18.22.1331
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B & K FASTPAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 11/165/16 x 11/16 od flat washers stainless 18-8 b18.22.1232
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B & K FASTPAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 3/45/16 x 3/4 od flat washers stainless 18-8 b18.22.12297
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B & K FASTPAFlat Washer316, 317, A4 StainlessPlain5/16 x 3/45/16 x 3/4 od flat washers stainless 316 b18.22.1120
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B & K FASTPAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 7/85/16 x 7/8 od flat washers stainless 18-8 b18.22.146
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B & K FASTPAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Black Oxide5/16 x 7/85/16 x 7/8 od flat washers 18-8 stainless ms 15795-813 (300-series) black ox b18.22.19
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B & K FASTPAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 15/16 x 1 od flat washers stainless 18-8 b18.22.12
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B & K FASTPAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 1 1/45/16 x 1 1/4 od flat washers stainless 18-8 b18.22.1988
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JET FITTINGCAFlat WasherSteelZinc/Clear5/16 x 1.250 x .047washer flat 5/16x1.250x.047 steel zinc plated (4 520 per 100lbs) b18.22.11366
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JET FITTINGCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x .750 x .048washer flat 5/16x.750x.048 stainless steel b18.22.11100
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JET FITTINGCAFlat WasherSteelZinc/Clear5/16 x 1.500 x .0715/16x1.500x.071 flat washer steel zinc b18.22.12362
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JET FITTINGCAFlat WasherSteelZinc/Yellow5/16 x .688 x .062flat washer 5/16x.688x.062 steel thru-hardened zinc yellow b18.22.16350
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JET FITTINGCAFlat WasherSteelNickel Plated5/16 x .688 x .0625/16x.688x.062 flat washer steel nickel b18.22.16868
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JET FITTINGCAFlat WasherSteelZinc/Clear5/16 x .688 x .062washer flat 5/16x.688x.062 steel zinc plated b18.22.176
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JET FITTINGCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x .688 x .1095/16x.688x.109 flat washer stainless steel 18-8 b18.22.11200
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JET FITTINGCAFlat WasherSteelZinc/Clear5/16 x .875 x .083washer flat 5/16x.875x.083 steel zinc plated b18.22.1175
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JET FITTINGCAFlat WasherNylon (Polyamide)Plain5/16 x .555 x .031 6/65/16x.555x.031 flat washer nylon 6/6 natural b18.22.111500
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JET FITTINGCAFlat WasherSteelBlack Oxide5/16 x .875 x .083washer flat 5/16x.875x.083 steel black oxide b18.22.11810
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JET FITTINGCAFlat WasherSteelPlain5/16washer flat 5/16 cu .567x.032 b18.22.1800
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THRDFASTFLFlat WasherBrassPlain5/16flat small b18.22.11,357
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THRDFASTFLFlat WasherSilicon BronzePlain5/16sili brnz flat b18.22.11,037
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THRDFASTFLFlat WasherGrade 8Plain5/16gr8 flat b18.22.143
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THRDFASTFLFlat WasherAluminumPlain5/16alum flat b18.22.11,406
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