Coupling Nuts are hexagonal shaped nuts with an extended body usually used to couple two studs together (also known as Extension Nuts).

-Coupling Nuts/Extension Nuts are machined from 12L14 cold finished hex bar stock.
-Used as a coupling nut with studs to lengthen bolts.
-Extra charge for case hardening.
Unit of Measure


Thread Size (in.)

N/A 1-1/4"-7

Width Across Flats (in.)

N/A 2

Length (in.)

N/A 3-3/4


N/A Stock Item