A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5935-00-117-4700
NSN 7035-01-526-6775
NSN 6105-01-147-6576
NSN 7035-01-633-9537
NSN 5945-01-193-0405
NSN 5915-01-152-0140
NSN 6150-01-563-5233
NSN 6650-01-176-3257
NSN 6220-00-419-0635
NSN 7035-01-216-4806
NSN 6685-01-208-4874
NSN 6220-01-245-7783