A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-276-0355
NSN 5905-01-367-8235
NSN 6650-01-081-1537
NSN 5905-00-231-0316
NSN 6220-01-019-0505
NSN 6220-01-079-5682
NSN 5965-01-377-3587
NSN 5915-00-351-7355
NSN 7035-00-252-7327
NSN 5895-00-235-4520
NSN 6240-00-428-4027
NSN 6150-01-243-4443