A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-01-174-6975
NSN 5920-01-069-3433
NSN 6645-01-192-3061
NSN 6650-01-486-5014
NSN 6240-00-960-8458
NSN 6135-01-100-9056
NSN 5925-00-784-3742
NSN 6130-00-232-2170
NSN 5930-01-500-9601
NSN 5996-00-514-7678
NSN 6105-01-004-1010
NSN 5965-01-366-5900