3/4"-10 x 2-1/4" Hot Dip Galvanized Inspection Hole Coupling Nuts (10 pcs.)

Diameter: 3/4"
Length: 2-1/4"
Material: Steel
Finish: Hot Dip Galvanized
Driver Type: 1-1/8" Wrench
Thread Size: 10 (Coarse)
Style: Inspection Hole
Type: Coupling Nut

Box of 10.

A coupling nut is a long nut tapped from each side to meet in the middle, rather than all the way through in the same direction, used to connect two threaded rods end to end.