Thumbscrew (3/8", internal)

This thumbscrew has a round plastic grip with scalloped edges, a plastic collar, and a 3/8" internal thread.

Grip diameter: 1 7/8"
Thread type: 3/8-16 (internal)
Thread depth: 3/4" (open end)
Collar diameter: 3/4"
Collar length: 3/4"