A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6685-00-468-6961
NSN 5985-01-014-3112
NSN 7035-00-320-5644
NSN 5905-01-424-8965
NSN 5905-01-602-8337
NSN 5960-01-649-1341
NSN 6645-01-193-9839
NSN 6110-01-111-0959
NSN 6145-01-373-3614
NSN 5985-01-592-5756
NSN 6110-00-106-6587
NSN 5835-01-394-3812