A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6685-01-249-9231
NSN 5905-01-526-3114
NSN 5835-00-071-5739
NSN 5990-01-529-6347
NSN 6130-01-605-2047
NSN 5950-01-396-2549
NSN 6145-00-773-2026
NSN 6145-01-132-9913
NSN 6105-00-900-4143
NSN 6105-00-561-7169
NSN 6610-00-300-2554
NSN 5910-00-248-6899