The KUPO KS-017SB Brass 16mm Spigot with 3/8" Male and 1/4" male thread is a universal double-sided, baby 5/8" (16mm) stud (black) with 1/4"-20 male thread on one side and a 3/8"-16 thread on the other. The stud is round and will fit into any 5/8" (16mm) receiver.

Specifications
Length     67.7 mm
Width     19.8 mm
Height     19.8 mm
Weight     70g
Primary Material     Steel
Colour    Black