A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5835-01-261-9878
NSN 5998-00-611-0032
NSN 5835-01-286-6499
NSN 6135-00-269-5843
NSN 5905-01-015-3776
NSN 5960-01-489-1510
NSN 2925-01-167-6500
NSN 5985-00-254-3136
NSN 7035-00-546-2560
NSN 5965-01-449-4606
NSN 5945-01-475-8117
NSN 6685-01-126-4376