A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6610-01-541-9794
NSN 5925-01-337-3336
NSN 5935-01-408-9463
NSN 5930-01-110-7733
NSN 6645-00-251-0688
NSN 6685-00-971-2570
NSN 6135-00-789-2865
NSN 6650-00-990-9541
NSN 5935-00-269-2766
NSN 5835-00-412-3284
NSN 6240-00-866-6239
NSN 5950-01-474-6085