A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-00-627-4499
NSN 5950-00-180-9943
NSN 6685-01-521-8942
NSN 6685-01-009-0493
NSN 5910-01-232-6462
NSN 6220-01-160-7249
NSN 7035-01-489-5679
NSN 5990-00-342-4388
NSN 5895-01-364-8459
NSN 6620-01-279-4353
NSN 5905-00-959-7149
NSN 6220-01-363-0152