Fastener Superstore is your source for coupling nuts, also known as rod couplings. We carry standard coupling nuts in diameters from 1/4" up to 1", and in lengths from 7/16" to 3".

Coupling nuts are longer than regular hex nuts and are used to join threaded rod or pipes together.

Standard coupling nuts join two pieces that have the same diameter / thread count. We also carry reducer coupling nuts which allow two different sized rods or pipes to be joined together.

Our standard coupling nuts are available in standard or grade 5 steel, with a zinc finish. We also offer them in 18-8 Stainless Steel. Our reducer coupling nuts are available in steel / zinc and come in four common sizes.