#4 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.

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Buy Hex Coupling Nuts from one of our FCH Network Members
Kanebridge ILCoupling NutSteelZinc/Clear#4-40 x 7/16 5/164-40x7/16-5/16 hex rod coupling nut 5/16 inch across flats zinc62.500
ZAL INDUSCACoupling NutSteelZinc/Clear#4-404-40 coupling nut pltd100
LippinCACoupling NutSteelZinc/Clear#4-40#4-40 coupling nut zinc50
HBBOLTCACoupling NutSteelZinc/Clear#4-40coupling nuts77

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