A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-00-068-7217
NSN 6150-01-548-6977
NSN 5965-01-335-4304
NSN 6685-01-375-5925
NSN 5925-00-849-8481
NSN 6240-01-349-6320
NSN 6110-00-073-6881
NSN 5985-01-172-1022
NSN 5975-00-196-0698
NSN 6135-00-175-7132
NSN 5945-00-284-3155
NSN 6620-01-032-3937