8 Chrome Pinball Leg Bolt Kit - Extended This is for a set of 8 Bolts Extended-length replacement chrome "acorn head" (rounded top) leg bolts for Williams, Bally, Data East, Sega, and Stern pinball machines. These bolts are 1/4" (3 threads) longer than the standard pinball leg bolt to accommodate the extra length needed for leg protectors, drink caddies, and leg plates with pim nuts.