A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5925-00-837-9467
NSN 6650-01-633-9147
NSN 6610-01-444-0953
NSN 5945-01-551-2066
NSN 5975-01-422-2033
NSN 6145-01-047-4345
NSN 6685-01-268-1724
NSN 5996-01-633-7979
NSN 5950-01-499-3036
NSN 5975-01-425-6033
NSN 5910-00-179-5826
NSN 5950-01-196-0814