5/8-18 Hex Coupling Nuts

Coupling Nuts, also known as Extension Nuts, are threaded fastener for joining two male threaded objects, most commonly threaded rod, but also pipes. The outside of the coupling nut is usually a hex so it can be gripped by a wrench.

13 results, (click on any line for more information)

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
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B & K FASTPACoupling NutSteelZinc/Clear5/8-18 x 2 1/85/8-18 x 2 1/8 long coupling nuts zinc b18.2.24
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ACCURATEILCoupling NutSteelPlain5/8-18 x 2 1/8hex coupling nut220
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AbabaCACoupling NutSteelZinc/Clear5/8-18 x 2 13/165/8-18 x 2 1/8 cplng nut 13/16 af stl znc b18.2.223
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LippinCACoupling NutSteelZinc/Clear5/8-18coupling nut fine zinc plated39
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JacksonMSCoupling NutSteelZinc/Clear5/8-18 x 13/16 x 2 1/8oal fine thread coupling nut140
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EBN IndusINCoupling NutSteelZinc/Clear5/8-18 x 2 1/85/8-18 x 2 1/8 coupling nut zinc b18.2.216
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RCFastAZCoupling NutGrade AZinc/Clear5/8-18hex coupling nut a563 gra cr+3 (13/16x2 1/8 economy)inquire
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RCFastAZCoupling NutGrade APlain5/8-18hex coupling nut a563 gra (13/16x2 1/8)inquire
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KBSTNCoupling NutSteelPlain5/8-18 x 1 7/85/8-18 x 1 7/8 hvy coupling nut 15/16 hex b18.2.2467
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Kanebridge ILCoupling NutSteelZinc/Clear5/8-18 x 2 1/85/8-18x2 1/8 hex rod coupling nut 13/16 inch across flats zinc2.500
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Valley NuWACoupling NutSteelZinc/Black5/8-18 x 2 1/8nf hex cplng economy nut zb37
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Alma BoltMICoupling NutSteelPlain5/8-18SAE (13/16afx2 1/8lg) coupling nut377
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ACCURATEILCoupling NutSteelZinc/Clear5/8-18 x 2 1/8 x 13/16coupling nuts250
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