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3/8 Hex Coupling Nuts (ASME B18. 2.2)

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.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
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GLFOHCoupling Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 1 1/83/8-16x1-1/8 hex coupling nut 18-8 s/s b18.2.2 () () ()177
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GLFOHCoupling NutSteelZinc/Clear3/8-16 x 1 3/43/8-16x1-3/4 hex coupling nut stl zc b18.2.2 () () ()417
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GLFOHCoupling NutSteelPlain3/8-16 x 1 1/83/8-16x1-1/8 hex coupling nut stl pln b18.2.2 () () ()60
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AbabaCACoupling Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 1 1/83/8-16 x 1 1/8 cplng nut s/s b18.2.2145
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AbabaCACoupling NutSteelZinc/Clear3/8-16 x 1 1/23/8-16 x 1 1/8 cplng nut 1/2 af stl znc b18.2.22484
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AbabaCACoupling Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 1 3/43/8-16 x 1 3/4 cplng nut s/s b18.2.215
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AbabaCACoupling NutSteelPlain3/8-16 x 1 3/43/8-16 x 1 3/4 cplng nut stl pln b18.2.21400
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AbabaCACoupling NutSteelZinc/Clear3/8-16 x 1 3/43/8-16 x 1 3/4 cplng nut stl znc b18.2.2400
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AbabaCACoupling NutSteelZinc/Clear3/8-16 x 1/23/8-16 x 1/2 redc cplng nut stl znc b18.2.24
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AbabaCACoupling NutSteelZinc/Clear3/8-24 x 1 1/23/8-24 x 1 1/8 cplng nut 1/2 af stl znc b18.2.2975
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AbabaCACoupling NutSteelGalvanized3/8-16 x 1 3/43/8-16 x 1 3/4 cplng nut stl hdg b18.2.25
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AbabaCACoupling Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 1 1/83/8-16 x 1 1/8 cplng nut s/s b18.2.245
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AbabaCACoupling NutSteelZinc/Clear3/8-16 x 1 3/43/8-16 x 1 3/4 cplng nut stl znc b18.2.2100
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AbabaCACoupling NutSteelZinc/Clear3/8-24 x 1 1/23/8-24 x 1 1/8 cplng nut 1/2 af stl znc b18.2.225
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Alma BoltMICoupling NutSteelZinc/Clear3/8-163/8-16 (1 3/4 lng x 9/16 af) zinc coupling nut special b18.2.21000
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SIIINCoupling NutSteelZinc/Clear3/8-16 x 1 3/4 x 5/83/8-16 x l1-3/4 x w5/8 coupling nut zinc plated b18.2.2126
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StandardMACoupling NutSteelGalvanized3/8-163/8-16 coupling nut galvanized b18.2.2905
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QFCTXCoupling NutSteelZinc/Clear3/8-16 x 1/2 x 1 1/83/8-16x1/2x1 1/8 economy coupling nut zinc b18.2.2296
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QFCTXCoupling NutSteelZinc/Clear3/8-16 x 1/2 x 1 1/83/8-16x1/2x1 1/8 economy coupling nut zinc b18.2.216
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QFCTXCoupling NutSteelZinc/Clear3/8-16 9/16 x 1 3/43/8-16 coupling nut 9/16x1 3/4l zinc b18.2.250
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QFCTXCoupling NutGrade APlain3/8-16 x 1 3/43/8-16x1-3/4 coupling nut a563 gr.a plain black b18.2.275
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B & K FASTPACoupling NutSteelPlain3/8-16 x 1 3/43/8-16 x 1 3/4 long coupling nuts pln b18.2.2300
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B & K FASTPACoupling NutSteelZinc/Clear3/8-16 x 1 1/83/8-16 x 1 1/8 short coupling nuts zinc b18.2.22602
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B & K FASTPACoupling NutSteelZinc/Clear3/8-16 x 1 3/43/8-16 x 1 3/4 long coupling nuts zinc b18.2.2114
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B & K FASTPACoupling NutSteelZinc/Clear3/8-24 x 1 1/83/8-24 x 1 1/8 long coupling nuts zinc b18.2.248
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B & K FASTPACoupling NutSteelGalvanized3/8-16 x 1 3/43/8-16 x 1 3/4 galv hex coupling nut b18.2.2183
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B & K FASTPACoupling Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 1 1/83/8-16 x 1 1/8 stainless coupling nuts b18.2.266
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Bostwick INCoupling NutSteelZinc/Clear3/8-24 x 1 1/83/8-24 x 1 1/8 coupling nut zinc b18.2.232
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THRDFASTFLCoupling NutSteelZinc/Clear3/8-16reducing coupling nut 1/4-20 b18.2.268
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THRDFASTOKCoupling NutSteelPlain3/8-16coupling nut b18.2.2298
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THRDFASTFLCoupling Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 1 1/818-8 ss coupling nut b18.2.214
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THRDFASTALCoupling NutSteelZinc/Clear3/8-16 x 1 1/8coupling nut b18.2.2450
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THRDFASTMSCoupling NutSteelZinc/Clear3/8-16 x 1 1/8coupling nut b18.2.28
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