Davies Thermoset Four Arm knob, Flute Rim, Threaded Stud, 3/8"-16 Thread Size X 2" Thread Length, 2" Diameter (Pack of 5) Mounting type: projecting stud Thread length/depth: 2" Mounting diameter and threads per inch: 3/8"-16 Plastic material: thermoset; insert material: steel, zinc plated Measures 2" diameter by 1" height Thread Size: 3/8 inches-16 Without set screw Rim Style: Fluted Insert Material: Steel, Zinc-Plated Right-handed nylon patch: Not present 2 inches X 1 inches