A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5925-01-202-9277
NSN 5998-00-869-6018
NSN 6240-00-266-6258
NSN 6610-00-342-9825
NSN 5835-01-452-4947
NSN 5990-01-605-4769
NSN 6650-01-145-9570
NSN 6650-01-181-6037
NSN 4140-01-653-9368
NSN 5945-01-181-4237
NSN 6105-01-030-4883
NSN 5910-01-045-2918