A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5985-00-802-7658
NSN 6135-01-391-6515
NSN 6650-00-422-2958
NSN 6320-01-123-6814
NSN 5960-01-307-6692
NSN 5915-01-224-3038
NSN 6150-01-579-5739
NSN 5996-01-032-9136
NSN 6145-01-148-9793
NSN 5985-00-186-0732
NSN 5905-00-252-9035
NSN 6150-00-839-3344