A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 2925-00-221-4977
NSN 6110-01-272-8996
NSN 6130-01-410-8529
NSN 6220-01-333-7978
NSN 5996-00-636-4849
NSN 7035-01-122-1264
NSN 6135-01-033-5052
NSN 6220-01-243-9971
NSN 6220-01-153-7943
NSN 6110-01-429-2358
NSN 5945-01-152-1932
NSN 5950-01-342-4528