A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5835-00-764-4388
NSN 6150-01-321-6183
NSN 6145-01-481-3688
NSN 5950-00-928-4228
NSN 6685-01-263-3552
NSN 5925-01-418-2872
NSN 6145-01-386-9658
NSN 6220-00-292-6775
NSN 5950-01-603-9808
NSN 6685-01-260-9156
NSN 5985-00-532-3710
NSN 5950-01-155-2033