A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5905-01-481-3943
NSN 6650-01-252-4710
NSN 6130-00-281-5978
NSN 7035-00-142-9076
NSN 5960-01-632-6576
NSN 5910-01-286-9647
NSN 6620-01-619-9263
NSN 2925-01-032-3814
NSN 5996-01-025-3611
NSN 5990-01-440-7135
NSN 5945-00-624-9513
NSN 6105-00-314-0542