A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6130-01-254-3934
NSN 5965-01-625-6857
NSN 5925-00-430-6343
NSN 5975-01-394-5281
NSN 6220-01-114-7420
NSN 6145-00-100-4358
NSN 6650-01-659-5594
NSN 6110-01-415-6545
NSN 6150-01-284-0234
NSN 6130-01-444-0557
NSN 5910-01-549-6962
NSN 5895-00-178-8443