Davies Thermoplastic Bar Knob, Smooth Rim, Threaded Hole, 3/8"-16 Thread Size X 1/2" Thread Length, 2-1/4" Diameter (Pack of 5)
Mounting type: female insert. Thread length/depth: 1/2". Mounting diameter and threads per inch: 3/8-16. Plastic material: thermoplastic; insert material: brass. Measures 2-1/4" diameter by 1-7/16" height.