A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6130-01-348-8897
NSN 5895-01-212-9165
NSN 7035-00-391-6345
NSN 6240-01-463-3132
NSN 5950-01-255-9054
NSN 5985-00-320-6403
NSN 5975-00-285-0907
NSN 5985-00-509-3415
NSN 5925-01-339-4840
NSN 5945-00-810-2251
NSN 5895-01-377-2435
NSN 5920-00-503-4850