FCH News

#4 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.)Plain#4.125 x .250 x .022 thk. stainless stl flatwasher b18.22.1 6175
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Irwin IndOntFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 flatwasher stainless steel b18.22.11000
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Irwin IndOntFlat WasherBrassPlain#4#4 flatwashers brass b18.22.13800
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Irwin IndOntFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 flatwashers s/s [.312 o.d.] b18.22.19929
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Irwin IndOntFlat WasherBrassNickel Plated#4#4 flatwashers brass & nickel plated b18.22.125000
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 flat 18-8 s/s ms-803 b18.22.1 () () ()4521
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x .125#4 flat 18-8 s/s .125x.312x.025/.040 b18.22.1 () () ()5074
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GLFOHFlat WasherSteelPlain#4#4(.125x.312x.032) steel flat/ cad/yel AN960-4 b18.22.1 () () ()1971
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4#4 (.125x.312x.032) ss flat/ 304ss MS15795-804 b18.22.1 () () ()982
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4#4 (.125x.250x.022) ss flat/ 304ss MS15795-803 b18.22.1 () () ()187
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GLFOHFlat WasherSteelCadmium/Yellow#4#4 (.125x.312x.032) steel flat/ cad/ye MS27183-4 b18.22.1 () () ()50
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GLFOHFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Black Oxide#4#4 (.125x.250x.022) ss flat/ black/oxi 304ss MS15795-803B b18.22.1 () () ()4300
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AbabaCAFlat WasherSteelPlain#4#4 lite series f/w steel yel plt (5/16 od) b18.22.1200
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AbabaCAFlat WasherNylon (Polyamide)Plain#4 x 1/4#4 x 1/4 f/w .032 thk nylon b18.22.12100
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AbabaCAFlat WasherNylon (Polyamide)Plain#4 x 1/4#4 x 1/4 f/w .047 thk nylon b18.22.190
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AbabaCAFlat WasherNylon (Polyamide)Plain#4 x 1/4#4 x 1/4 flat washer .062 thk black nylon b18.22.1600
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AbabaCAFlat WasherNylon (Polyamide)Plain#4 x 5/16#4 x 5/16 f/w .062 thk nylon b18.22.11040
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AbabaCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 3/8#4 x 3/8 f/w s/s b18.22.12600
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AbabaCAFlat Washer316, 317, A4 StainlessPlain#4#4 f/w 316 s/s b18.22.13200
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AbabaCAFlat WasherBrassPlain#4#4 f/w brass b18.22.194
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AbabaCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 f/w s/s b18.22.117570
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AbabaCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 f/w lt pat s/s b18.22.1354
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AbabaCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#620 f/w #4 s/s (.115 x .209 x .032) b18.22.11000
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AbabaCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 lght flat washer s/s b18.22.11500
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AbabaCAFlat WasherNylon (Polyamide)Plain#4 x 1/4#4 x 1/4 f/w .062 thk nylon b18.22.12239
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AbabaCAFlat WasherSteelPlain#4#4 reg series f/w steel yel plt (5/16 od) b18.22.11200
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AbabaCAFlat WasherNylon (Polyamide)Plain#4 x 1/4#4 x 1/4 f/w .032 thk nylon b18.22.1400
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AbabaCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 f/w s/s b18.22.11400
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QFCTXFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 retainer 18-8 304 steel b18.22.11000
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QFCTXFlat WasherSteelZinc/Clear#4#4 type-b narrow flat triv zinc b18.22.17500
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QFCTXFlat WasherSteelZinc/Clear#4#4 type-b narrow flat triv zinc b18.22.1908
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QFCTXFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 type-b narrow flat 18-8 s/s b18.22.1240
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QFCTXFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 type-b narrow flat 18-8 s/s b18.22.112860
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QFCTXFlat WasherSteelZinc/Clear#4#4 type-b regular flat tri-zinc b18.22.11000
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QFCTXFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 type-b regular flat 18-8 b18.22.11000
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QFCTXFlat WasherSteelZinc/Yellow#4#4 type-b wide flat zinc/yellow b18.22.1390
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QFCTXFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4.125x.312x.025-.040 flat 18-8 (#4) 304ss MS15795-804 b18.22.12000
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B & K FASTPAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4#4 flat washers stainless 18-8 b18.22.1903801
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JET FITTINGCAFlat WasherFiberPlain#4 x .228 x .032#4x.228x.032 flat washer fibre b18.22.111670
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JET FITTINGCAFlat WasherSteelFluoropolymer-Based (Xylan, Fluorokote, Teflon)#4 x .312 x .030#4x.312x.030 flat washer teflon b18.22.13355
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JET FITTINGCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4 x .187 x .016#4x.187x.016 flat washer stainless steel 18-8 passivated mfg seastrom b18.22.18000
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JET FITTINGCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x 5/16 x 0.016whr flat 1/4 ss .500x.032 rohs compliant per an960l b18.22.15000
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JET FITTINGCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x .312 x .032washer flat #4x.312x.032 stainless steel b18.22.14153
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JET FITTINGCAFlat WasherSteelZinc/Clear#4 x .280 x .025#4x.280x.025 flat washer steel zinc b18.22.117175
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JET FITTINGCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x .209 x .032#4x.209x.032 flat washer stainless steel 18-8 b18.22.14300
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JET FITTINGCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x .209 x .032#4x.209x.032 flat washer stainless steel 18-8 b18.22.14200
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JET FITTINGCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4 x .209 x .016#4x.209x.016 flat washer stainless steel 18-8 b18.22.12000
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JET FITTINGCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Black Oxide#4 x .209 x .016#4x.209x.016 flat washer stainless steel 18-8 black oxide and wax b18.22.11550
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JET FITTINGCAFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4washer flat #4 x.250x.022 stainless steel 18-8 b18.22.14500
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THRDFASTFLFlat Washer316, 317, A4 StainlessPlain#4t-316 ss f/w b18.22.1150
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THRDFASTFLFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4ms15795-803 18-8 s 304ss b18.22.13,496
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THRDFASTFLFlat Washer300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4ms15795-804 18-8 s 304ss b18.22.1171
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