A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5895-01-548-2944
NSN 6240-01-290-5165
NSN 6685-00-042-5073
NSN 5975-01-341-8945
NSN 6645-01-570-3215
NSN 5895-00-097-8948
NSN 6110-01-632-1792
NSN 5950-01-336-5546
NSN 5935-00-081-9542
NSN 6130-00-621-7997
NSN 6145-00-286-5636
NSN 6135-01-462-4442