The 5/8" Stud with 3/8"-16 Female Thread from Kupo is a 3.5" long 5/8" Baby stud that incorporates a 3/8"-16 female thread designed to mount a stud on a tripod, suction cup or anything with a 3/8"-16 male thread. This lightweight aluminum adapter features a recessed, knurled neck and a safety pin hole for secure mounting.