Could be a first generation Mac1 pump compatible pgp bolt, empty,
Could be a first generation Mac1 pump compatible pgp bolt, good shape,hasn't see much if any use , no bearing holes, no lug screw, empty, no hole for pump arm set screw
Could be a first generation Mac1 pump compatible pgp bolt, good shape,hasn't see much if any use , no bearing holes, no lug screw, empty, no hole for pump arm set screw