A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5925-00-435-8391
NSN 5915-01-351-4745
NSN 5950-01-090-2496
NSN 5965-00-445-1843
NSN 2925-01-462-1620
NSN 5945-00-203-5859
NSN 6135-00-276-7625
NSN 6135-00-191-6444
NSN 5999-00-116-8983
NSN 5960-01-505-2426
NSN 6320-01-084-7456
NSN 5975-00-204-9190