A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5999-00-114-1486
NSN 6220-01-013-9498
NSN 6220-01-243-5316
NSN 6320-01-198-4024
NSN 5920-01-097-5447
NSN 5895-01-491-7410
NSN 6220-01-519-9305
NSN 5935-01-147-5432
NSN 5950-00-397-9869
NSN 5905-00-827-3921
NSN 5960-01-567-1096
NSN 6685-01-353-6635