A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-00-338-9164
NSN 5925-00-337-8138
NSN 6130-00-762-2239
NSN 5895-01-029-3791
NSN 5996-01-137-6008
NSN 5835-01-327-6324
NSN 6645-01-287-9969
NSN 6610-01-645-6275
NSN 5935-00-468-7447
NSN 6240-00-079-0112
NSN 5999-01-109-7864
NSN 5975-01-461-7852