Brass plated acornhead leg bolts commonly refered to as "gold" leg bolts.
They work on all makes of pinball machines: Williams, Bally, Stern, Data East, Sega, and Gottlieb.
Thread: 3/8" -16 (Diameter 9,5mm)
Head: 5/8" (15,9mm)
Length whithout head:
- standard = 2-1/2" / 63mm
References:
Williams/Bally #4322-01125-40, 231-5001-01G
Data East/Sega/Stern #231-5001-01