A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5950-01-507-2145
NSN 5950-00-177-7944
NSN 6130-00-778-9793
NSN 5855-00-054-8617
NSN 5998-01-075-4001
NSN 6130-01-575-8321
NSN 5910-01-447-3405
NSN 6620-01-147-5486
NSN 6110-01-167-8906
NSN 2925-01-354-1752
NSN 5935-01-040-6758
NSN 6220-00-464-0424