A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-01-037-5823
NSN 6220-01-004-6234
NSN 5999-01-353-7366
NSN 5905-01-142-3362
NSN 5920-01-565-8377
NSN 5996-00-065-8376
NSN 6650-01-254-3048
NSN 5950-01-134-4281
NSN 6220-01-022-5809
NSN 5960-01-156-7469
NSN 5910-00-306-2058
NSN 5990-00-984-6758