A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5950-00-895-9209
NSN 6150-01-543-4770
NSN 5855-01-604-0801
NSN 6150-01-472-4379
NSN 6135-00-057-2005
NSN 5935-00-293-1863
NSN 5990-01-243-4233
NSN 5895-00-240-3295
NSN 5910-01-580-0857
NSN 6320-01-465-2028
NSN 4140-01-039-8885
NSN 5960-01-521-5827