A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6240-01-340-7591
NSN 6130-01-461-2954
NSN 6620-01-395-5214
NSN 5996-00-106-8258
NSN 5950-01-095-7837
NSN 5998-01-598-3039
NSN 6685-01-495-5551
NSN 5835-00-341-5441
NSN 5996-01-353-3259
NSN 5905-01-215-1143
NSN 5905-01-407-7328
NSN 6645-01-460-8561