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#4 Machine Screw Nut (ASME B18. 2.2)

Machine screw nuts are hex and square nuts available in much smaller sizes than regular finished hex nuts and are usually used with machine screws rather than machine bolts.

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Buy Machine Screw Nut from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
Irwin IndOntMachine Screw NutNylon (Polyamide)Plain#4-404-40 hex nylon m/screw nut # 0400440hn b18.2.2 b18.6.3 4761
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Irwin IndOntMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 unc hex machine screw nuts stainless stl b18.2.2 b18.6.3 33000
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Irwin IndOntMachine Screw NutSteelZinc/Clear#4-404-40 unc hex machine screw nuts steel zinc trivalent clr b18.2.2 b18.6.3 43395
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Irwin IndOntMachine Screw NutSteelZinc/Black#4-404-40 hex m/s nut steel .0002 min zinc trivalent black b18.2.2 b18.6.37267
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Irwin IndOntMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 on #2 hex machine screw nuts small pattern s/s b18.2.2 b18.6.3 475
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GLFOHMachine Screw NutSteelZinc/Yellow#4-40#4-40 sml pat hex m/s nut stl zy b18.2.2 b18.6.3 () () ()19766
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GLFOHMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-404-40 (1/4x3/32) ss hex m/s nut w/certs 304ss MS35649-244 b18.2.2 b18.6.3 () () ()1099
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GLFOHMachine Screw NutSteelCadmium/Yellow#4-404-40 (1/4x3/32) steel hex m/s nut cad/yellow MS35649-242 b18.2.2 b18.6.3 () () ()454
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GLFOHMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40#4-40 sml pat hex m/s nut 18-8 s/s b18.2.2 b18.6.3 () () ()151
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GLFOHMachine Screw NutSteelZinc/Clear#4-40#4-40 hex m/s nut stl zc b18.2.2 b18.6.3 () () ()34713
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GLFOHMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40#4-40 hex m/s nut 18-8 s/s b18.2.2 b18.6.3 () () ()2965
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GLFOHMachine Screw NutBrassPlain#4-40#4-40 hex m/s nut brs b18.2.2 b18.6.3 () () ()1862
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AbabaCAMachine Screw NutBrassPlain#4-404-40 m/s nut brass b18.2.2 b18.6.3200
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AbabaCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 m/s nut s/s b18.2.2 b18.6.311600
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AbabaCAMachine Screw NutSteelZinc/Yellow#4-404-40 m/s nut trivalent stl yel znc b18.2.2 b18.6.32686
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AbabaCAMachine Screw NutSteelZinc/Clear#4-404-40 m/s nut stl znc b18.2.2 b18.6.329600
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AbabaCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-484-48 m/s nut s/s b18.2.2 b18.6.3194
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AbabaCAMachine Screw NutNylon (Polyamide)Plain#4-404-40 m/s nut nylon b18.2.2 b18.6.31900
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ASMCILMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40coarse square machine screw nut ss18-8 b18.2.2272
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AbabaCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 m/s nut s/s b18.2.2 b18.6.31200
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AbabaCAMachine Screw NutSteelZinc/Clear#4-404-40 m/s nut stl znc b18.2.2 b18.6.31000
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SIIINMachine Screw NutSteelZinc/Clear#4-404-40 zinc machine screw nut) b18.2.2 b18.6.320064
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JET FITTINGCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 hex ms nut 18-8 1-M-4C b18.2.2 b18.6.33309
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JET FITTINGCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40ms35649-244 4-40 hex ms nut ss 304ss MS35649-244 b18.2.2 b18.6.3650
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JET FITTINGCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 small patt hex ms nut 18-8 3/16 af 1/16 thk 1-SP-4C b18.2.2 b18.6.3725
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JET FITTINGCAMachine Screw NutSteelZinc/Clear#4-404-40 hex ms nut stl zinc 325080 b18.2.2 b18.6.39670
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StandardMAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 machine screw nut 18-8 stainless steel b18.2.2 b18.6.3129250
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QFCTXMachine Screw NutSteelZinc/Clear#4-404-40 small patter hex nut steel zinc clear sorted 50ppm b18.2.2 b18.6.33000000
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QFCTXMachine Screw NutSteelPlain#4-404-40 machine screw nut nylon b18.2.2 b18.6.32000
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QFCTXMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 machine screw nut 18-8 b18.2.2 b18.6.312300
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QFCTXMachine Screw NutSteelZinc/Clear#4-404-40 small pat hex m/s nut trivalent b18.2.2 b18.6.323600
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QFCTXMachine Screw NutSteelZinc/Yellow#4-404-40 small pat hex m/s nut zinc/yellow b18.2.2 b18.6.3870
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QFCTXMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 mach nut small pattern 18-8 ss b18.2.2 b18.6.32000
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General FMIMachine Screw NutSteelZinc/Clear#4-404-40 (1/4x3/32) hex ms nut.00015 zn b18.2.2 b18.6.3294,365
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OSSCORIMachine Screw NutNylon (Polyamide)Plain#4-404-40 machine screw nut nylon b18.2.2 b18.6.3100
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QFCTXMachine Screw NutSteelZinc/Yellow#4-404-40 machine screw nut trivalent z/y b18.2.2 b18.6.31000
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Bostwick INMachine Screw NutSteelPlain#4-404-40 machine screw nut b18.2.2 b18.6.325
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PerigeeMIMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Silver Plated#4-40 x 1/4 x 3/324-40 x 1/4 x 3/32 hex machine screw nut b18.2.2 b18.6.3147
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JET FITTINGCAMachine Screw NutBrassPlain#4-404-40 hex machine screw nut brass b18.2.2 b18.6.3500
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JET FITTINGCAMachine Screw NutSteelCadmium/Yellow#4-404-40 hex machine screw nut steel cadmium ii yellow b18.2.2 b18.6.34500
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JET FITTINGCAMachine Screw NutSteelNickel Plated#4-404-40 machine screw hex nut steel nickel plated b18.2.2 b18.6.33200
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JET FITTINGCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40nut machine screw hex 4-40 stainless steel 18-8 b18.2.2 b18.6.32270
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WurthOntMachine Screw NutGrade 2Zinc/Clear#4-40nut hx ms gr2 (zn) 4-40 b18.2.2 b18.6.33600
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WurthOntMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40nut hx ms sst (18-8) (pl) 4-40 b18.2.2 b18.6.32907
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KBSTNMachine Screw NutSteelZinc/Clear#4-404-40 machine screw nut pltd b18.2.2 b18.6.337,277
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THRDFASTFLMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-4018-8 ss mach screw nut b18.2.2 b18.6.32,022
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THRDFASTOKMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-4018-8 ss mach screw nut b18.2.2 b18.6.370
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THRDFASTALMachine Screw Nut316, 317, A4 StainlessPlain#4-40t-316 ss mach screw nut b18.2.2 b18.6.3472
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DavisILMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40#4-40 hex m/s nut-stainless b18.2.2 b18.6.31,100
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DavisILMachine Screw NutSteelZinc/Clear#4-40#4-40 hex m/s nut-steel-3/16 atf zinc b18.2.2 b18.6.38,300
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