A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5985-00-010-7754
NSN 6105-01-551-8616
NSN 5975-01-413-5239
NSN 6320-00-925-0558
NSN 6105-01-351-3177
NSN 5990-00-519-9974
NSN 6645-00-574-9712
NSN 5965-01-171-9796
NSN 6650-01-351-9742
NSN 5855-01-315-6180
NSN 5960-01-505-2426
NSN 6240-00-999-7806