A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5910-01-224-7203
NSN 6220-01-422-9105
NSN 5998-00-382-9284
NSN 7035-00-541-8516
NSN 6240-01-382-3756
NSN 5855-01-334-6594
NSN 6685-00-081-2044
NSN 6220-00-871-6154
NSN 5925-01-122-5271
NSN 5960-00-435-1967
NSN 5935-01-361-5830
NSN 6685-01-146-8649