#4 Machine Screw Nut

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.

5,323 Machine Screw Nut, showing 200, (click on any line for more information)

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
Zoro Tools Inc.Machine Screw NutSteelZinc/Clear#4-40#4-40 zinc plated finish carbon steel machine screw hex nuts 100 pk.
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MESAFASTCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40hex m/s nut 18-8 s/s98.0
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Cal FastenrsCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Black Oxide#4-404-40 hex m/s nut - 18-8 304 / hex m/s nut7,500
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Cal FastenrsCAMachine Screw NutSteelZinc/Yellow#4-40 3/16hex small pattern m/s nut Cr3+ ms nut 3/16 hex7,775
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Cal FastenrsCAMachine Screw NutSteelZinc/Clear#4-404-40 hex m/s nut - rohs compliant 1/4 across the flats21,000
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UNEEDANJMachine Screw NutSteelPlain#4-40 x 3/16(af) m/s hex nut1140
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UNEEDANJMachine Screw NutSteelPlain#4-36 x 1/4(af) m/s hex nut1100
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UNEEDANJMachine Screw NutSteelPlain#4-40 x 1/4(af) m/s hex nut10000
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UNEEDANJMachine Screw NutSteelPlain#4-40 x 1/4(af) m/s hex nut1900
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UNEEDANJMachine Screw NutSteelPlain#4-36 x 3/16(af) m/s hex nut10000
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IRFNJMachine Screw NutBrassPlain#4-40hex machine screw nut23773
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IRFNJMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40machine screw hex nut 18-8 s/s24970
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SunPackFLMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-4018-8 ss machine screw hex nut75
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GlobalCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#4-40machine screw nut 18-8 ss passivate1,200
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GlobalCAMachine Screw NutSteelZinc/Clear#4-40machine screw nut ii9,150
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GlobalCAMachine Screw NutSteelZinc/Clear#4-40machine screw nut clear1,659
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GlobalCAMachine Screw NutNylonPlain#4-40machine screw nut8,800
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GlobalCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40MS35649-244578
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GlobalCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40machine screw nut 18-8 ss black400
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YANKEENHMachine Screw NutSteelPlain#4-404-40 machine screw nut black240
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YANKEENHMachine Screw NutBrassPlain#4-404-40 machine screw nut brass690
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YANKEENHMachine Screw NutAluminumPlain#4-404-40 machine screw nut alum190
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YANKEENHMachine Screw NutNylonPlain#4-404-40 machine screw nut nylon925
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TSFTXMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40nut 440(unjc-3b) small pattern cres s/s70
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TSFTXMachine Screw NutSteelZinc/Clear#4-40hex machine screw nut trivalent zinc 44017540
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TSFTXMachine Screw NutSteelZinc/Black#4-40hex machine screw nut steel black zinc 4-40900
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TSFTXMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40hex machine screw nut ss 44051500
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TSFTXMachine Screw Nut316, 317, A4 StainlessPlain#4-40 x 1/4 x 3/32hex machine screw nut 316 ss 4-40 x 1/4 x 3/32620
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YANKEENHMachine Screw NutSteelZinc/Clear#4-40machine screw nut39000
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YANKEENHMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40machine screw nut(1/4 acflts) 18-8 s/s5281
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YANKEENHMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Black Oxide#4-40machine screw nut 18-8 s/s18384
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YANKEENHMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40small pattern (3/16 acrflts) machine screw hex nut 18-8 s/s14966
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YANKEENHMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40ms35649-244 4-40 machine screw hex nuts 300 series 18-8 304 304ss265
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YANKEENHMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40nas671c4 4-40 small patter hex machine screw nut 300 series 18-8 304 304ss480
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ACFCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 s/s hex m/s nut1000
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NAPPCOTXMachine Screw NutSteelZinc/Clear#4-40hexm/s nutsteelzincpltsmallpattern 4-4015770
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NAPPCOTXMachine Screw Nut316, 317, A4 StainlessPlain#4-40hex m/s nut s/s t316 4-40240
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Set ScrewILMachine Screw NutSteelZinc/Clear#4-40machine screw nutinquire
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Set ScrewILMachine Screw NutSteelZinc/Clear#4-40hex machine screw nut double chamferedinquire
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Set ScrewILMachine Screw NutSteelPlain#4-40small pattern machine screw hex nutinquire
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Set ScrewILMachine Screw NutSteelZinc/Clear#4-40small pattern machine screw nutinquire
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Set ScrewILMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40small pattern machine screw hex nut 18-8 304inquire
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Set ScrewILMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40small pattern dfars 18-8 304 machine screw hex nutinquire
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Set ScrewILMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40#4-40 regular finished machine screw hex nut 303 stainless steel dfarsinquire
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QCSORMachine Screw NutSteelZinc/Clear#4-404-40 hex m/s nut zinc rohs4261
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QCSORMachine Screw NutNylonPlain#4-404-40 hex m/s nut nylon essentra7000
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QCSORMachine Screw NutSteelBlack Oxide#4-404-40 hex m/s nut black oxide6145
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QCSORMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 hex m/s nut ss5590
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QCSORMachine Screw NutBrassPlain#4-40 x 1/44-40 x 1/4 m/s hex nut brass518
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QCSORMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 x 3/16 small pattern hex m/s nut ss nas671c41050
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VertexDILMachine Screw NutBrassPlain#4-404-40 nc hex machine scr nut brass422326
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VertexDILMachine Screw NutBrassPlain#4-404-40 nc hex machine scr nut brass422326
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METRO INDOHMachine Screw NutSteelZinc/Clear#4-40machine screw nut uss38185
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METRO INDOHMachine Screw NutBrassPlain#4-40machine screw nut uss743
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METRO INDOHMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40machine screw nut USS s/s14600
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NutsBoltsNEMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 ss hex m/s nut2126
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NutsBoltsNEMachine Screw NutSteelZinc/Clear#4-484-48 hex m/s nut zp328
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NutsBoltsNEMachine Screw NutSteelZinc/Clear#4-404-40 hex m/s nuts zp5013
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AmericanNYMachine Screw NutSteelZinc/Clear#4-40 x 3/16 x 1/16m/s nut pl50200
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AmericanNYMachine Screw NutBrassNickel#4-36 x 3/16 x 1/16m/s nut pl1840
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AmericanNYMachine Screw NutBrassCadmium#4-36 x 1/4 x .080m/s nut cad pl10000
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AmericanNYMachine Screw NutBrassCadmium#4-36 x 1/4 x 3/32m/s nut cad pl6200
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AmericanNYMachine Screw NutBrassPlain#4-36 x 1/4 x 3/32m/s nut6700
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AmericanNYMachine Screw NutBrassNickel#4-36 x 1/4 x 3/32m/s nut pl13175
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AmericanNYMachine Screw NutBrassBlack Oxide#4-40 x 3/16 x 1/16m/s nut blk ox2500
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AmericanNYMachine Screw NutBrassNickel#4-40 x 7/32 x 3/32ms nut pl1200
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AmericanNYMachine Screw NutBrassNickel#4-40 x 1/4 x 5/64m/s nut pl1500
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AmericanNYMachine Screw NutBrassZinc/Yellow#4-40 x 1/4m/s nut1000
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AmericanNYMachine Screw NutBrassCadmium#4-40 x 1/4 x .085m/s nut cad pl1600
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AmericanNYMachine Screw NutBrassPlain#4-40 x 1/4 x 3/32m/s nut500
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AmericanNYMachine Screw NutBrassPlain#4-40 x 1/4 x 3/32m/s nut black1000
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AmericanNYMachine Screw NutSteelPlain#4-36 x 1/4 x 3/324/36 x 1/4 x 3/32 hex m/s nut1000
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AmericanNYMachine Screw NutSteelNickel#4-40 x 1/4m/s nut pl2000
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AmericanNYMachine Screw NutSteelCadmium/Yellow#4-40 x 1/44/40 x 1/4 hex m/s nut cad10000
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ACCURATEILMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40hex ms nut 18-8 s/s1300
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AmericanNYMachine Screw NutSteelPlain#4-40hex machine nut2000
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AmericanNYMachine Screw NutSteelZinc/Black#4-40hex m/s nut black500
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AmericanNYMachine Screw NutBrassPlain#4-40 x 1/4 x 3/324/40 x 1/4 x 3/32 hex m/s nut brass black7700
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AmericanNYMachine Screw NutSteelZinc/Clear#4-40 x 5/16 x 3/324/40 x 5/16 x 3/32 m/s nut zinc pl8000
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AmericanNYMachine Screw NutSteelZinc/Clear#4-404/40 hex m/s nut zp31640
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AmericanNYMachine Screw NutSteelZinc/Clear#4-484/48 m/s nut zinc pl500
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AmericanNYMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404/40 hex m/s nut stainless7400
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AmericanNYMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-484/48 m/s nut stainless3500
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CenturyFLMachine Screw NutSteelPlain#4-40ms21042l04312
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CenturyFLMachine Screw NutSteelPlain#4-40ms21043-0411691
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CenturyFLMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40ms21045c04365
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut2,200
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut3250
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut7599
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut6244
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut22000
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut stl25
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut8587
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut3653
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut3113
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut700
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CenturyFLMachine Screw NutSteelPlain#4-404-40 square m/s nut300
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CenturyFLMachine Screw NutSteelPlain#4-404-40 sm pa hex ms nut6137
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut476
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Purchase MOMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 hex m/s nut 18-8 sta stl (013009-3401)855
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Purchase MOMachine Screw NutSteelZinc/Clear#4-404-40 hex m/s nut (3/16 across flats) stl zn14730
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Purchase MOMachine Screw NutSteelZinc/Clear#4-40 1/44-40 hex m/s nut stl zinc 1/4 across flats29000
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AbabaCAMachine Screw NutBrassPlain#4-404-40 m/s nut brass b18.2.2 b18.6.3800
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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 b18.6.38300
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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/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 b18.6.32335
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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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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 NutNylonPlain#4-404-40 m/s nut nylon b18.2.2 b18.6.3100
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SIIINMachine Screw NutSteelZinc/Clear#4-404-40 zinc machine screw nut) b18.2.2 b18.6.332764
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Future FastenerTXMachine Screw NutSteelZinc/Clear#4-404-40 machine screw hex nut zinc plated1,961
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Future FastenerTXMachine Screw NutBrassPlain#4-404-40 machine screw hex nut brass21
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Future FastenerTXMachine Screw NutNylonPlain#4-404-40 hex machine screw nut nylon125
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Future FastenerTXMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40#4-40 small pattern machine screw hex nut stainless steel2,213
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Future FastenerTXMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40#4-40 machine screw hex nut stainless steel31,675
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JacksonMSMachine Screw NutSteelZinc/Clear#4-40nc machine screw nut260208
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JacksonMSMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40nc machine screw nut 18-8 304 .25 wafx.094 thick1173
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JacksonMSMachine Screw NutBrassPlain#4-40nc machine screw nut1136
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JacksonMSMachine Screw NutBrassPlain#4-48nf machine screw nut1062
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TownCountryARMachine Screw NutSteelZinc/Clear#4-40hex machine screw nut9095
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CenturyFLMachine Screw NutSteelPlain#4-404-40 hex m/s nut9856
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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#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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BrikksenFLMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 hex ms nut ss 100 per box f-72 box b18.2.2 b18.6.3366
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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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Wurth AdaMNMachine Screw NutGrade 2Zinc/Clear#4-40nut hex m/s grade 2 (zt) 4-4021,150
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Irwin IndOntMachine Screw NutNylonPlain#4-404-40 hex nylon m/screw nut # 0400440hn b18.2.2 b18.6.348511
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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 b18.6.339099
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Irwin IndOntMachine Screw NutSteelZinc/Clear#4-404-40 unc hex machine screw nuts steel zinc trivalent clr b18.2.2 b18.6.375998
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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 b18.6.39283
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Irwin IndOntMachine Screw Nut3 00 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 b18.6.312118
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DeltaTXMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40hx machine screw nut 18-8 sst 4-403651
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DeltaTXMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40hx machine screw nut 18-8 sst 4-40100
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DeltaTXMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-48hx machine screw nut 18-8 sst 4-48500
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DeltaTXMachine Screw Nut316, 317, A4 StainlessPlain#4-40hx machine screw nut 316 sst 4-40753
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DeltaTXMachine Screw NutBrassZinc/Clear#4-48hx machine screw nut brass zinc 4-482060
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DeltaTXMachine Screw NutBrassPlain#4-40hx machine screw nut brass 4-404311
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DeltaTXMachine Screw NutBrassNickel#4-40hx machine screw nut brass nickel 4-401300
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DeltaTXMachine Screw NutNylonPlain#4-40hx machine screw nut nylon 4-403140
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DeltaTXMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40small pattern m/s nut 18-8 sst 4-402631
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RCFastAZMachine Screw NutBrassPlain#4-40hex machine screw nutinquire
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RCFastAZMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 hex mach sc nut 18-8 304 (1/4x3/32) ms35649-244inquire
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RCFastAZMachine Screw NutSteelZinc/Clear#4-40hex machine screw nut stl cr+3 (1/4x3/32)3000
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RCFastAZMachine Screw NutSteelZinc/Clear#4-40hex machine screw nut small pattern stl cr+3 (3/16x1/16)3300
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RCFastAZMachine Screw NutSteelCadmium/Yellow#4-40nut MS35649-242inquire
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RCFastAZMachine Screw NutSteelPlain#4-40hex machine screw nut small pattern stl (3/16x1/16)inquire
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RCFastAZMachine Screw NutSteelPlain#4-40hex machine screw nut stl (1/4x3/32)inquire
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RCFastAZMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40hex machine screw nut small pattern 18-8 304 (3/16x1/16)9600
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ACFCAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 s/s extra thin small pattern hex m/s nut15000
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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 b18.6.3inquire
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BHAMALMachine Screw NutSteelZinc/Clear#4-40small pat hex m/s nut zn3,600
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OBRIENOHMachine Screw NutSteelPlain#4-40nut MS35649-4318785,000
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AFPILMachine Screw NutNylonPlain#4-40machine screw hex nut natural620
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OBRIENOHMachine Screw Nut316, 317, A4 StainlessPlain#4-40hex mach scr nut 316 stainless50
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MidStatesMIMachine Screw NutSteelPlain#4-32machine scr nut2297
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SISAZMachine Screw NutSteelZinc/Clear#4-40square m/s nut463
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SISAZMachine Screw NutBrassPlain#4-40small pattern hex machine screw nut18900
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ACFCAMachine Screw NutSteelCadmium#4-404-40 hex m/s nut cad ii180
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HewesNYMachine Screw NutSteelZinc/Clear#4-40hex mach scr smallpattern nut pl3000
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HewesNYMachine Screw NutSteelBlack Oxide#4-40hex m/s nut9000
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HewesNYMachine Screw Nut316, 317, A4 StainlessPlain#4-40hex mach scr nut316 s/s823
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HewesNYMachine Screw NutSteelBlack Oxide#4-40hex mach scr nutsmall ptn.-ide27776
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HewesNYMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40hex mach scr nut18-8 s/s24715
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HewesNYMachine Screw NutSteelZinc/Clear#4-40hex mach scr nut pl11200
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HewesNYMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-48hex mach scr nut18-8 s/s1000
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HewesNYMachine Screw NutSteelZinc/Clear#4-40square m/s nut1000
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MFSKSMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Zinc/Yellow#4-40small pattern hex nut6788
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GUIDONNJMachine Screw NutBrassNickel#4-40543
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MasFasCorpNVMachine Screw NutSteelZinc/Clear#4-40hex machine screw nutinquire
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MasFasCorpNVMachine Screw NutBrassPlain#4-40hex machine screw nutinquire
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MasFasCorpNVMachine Screw NutNylonPlain#4-40hex machine screw nutinquire
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MasFasCorpNVMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40hex machine screw nut 18-8 s/sinquire
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MasFasCorpNVMachine Screw NutSteelZinc/Clear#4-40small pat hex m/s nutinquire
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KomarILMachine Screw NutSteelNickel#4-40hex sm.pat.m/s nut(3/16x1/16)7,000
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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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Valley NuWAMachine Screw NutBrassPlain#4-40nc machine screw nut41
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Valley NuWAMachine Screw NutNylonPlain#4-40nc machine screw nut pl1865
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LightningLAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40hex machine screw nut 18-8 ss8792
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LightningLAMachine Screw NutSteelZinc/Clear#4-40hex machine screw nut1500
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SeattleNBWAMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40hex machine screw nut 18-8 ss840
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QFSMIMachine Screw Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40hex machine screw nut (18-8)700
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