1/2"-13 x 1-1/2" Zinc Plated Steel Coarse Thread Inspection Hole Coupling NutsType: Coupling Nuts
Driver Type: 11/16" Wrench
Thread Size: 13 (Coarse)
Style: Inspection Hole and Stop
Type: Coupling Nut
Box of 25.
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.