A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5965-01-408-6218
NSN 4140-00-099-9205
NSN 6220-00-500-4813
NSN 5965-01-601-6444
NSN 5985-00-952-7659
NSN 5835-00-614-0650
NSN 6240-00-326-2966
NSN 6650-01-168-8451
NSN 5905-01-309-0692
NSN 5930-01-546-2692
NSN 5990-00-045-5353
NSN 6650-01-437-7808