(Note: Measurements are outside max. dimensions unless stated otherwise).18th Century : Bun foot with fine knurled centre banding. Diam. 20mm. (3/4")Height 9.5mm. (3/8") Diam. collar 14mm. (9/16")The original came from a bracket clock. It is recommended that if selecting screw thread option, a pilot hole is drilled and pre-cut with a steel screw of slightly smaller size before screwing in the casting to avoid shearing.