A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5950-01-415-6606
NSN 6620-01-384-2105
NSN 5935-01-556-8907
NSN 6105-00-318-9205
NSN 6620-01-090-3803
NSN 6685-01-223-8882
NSN 5950-00-722-3546
NSN 5895-01-555-8821
NSN 5915-01-317-4080
NSN 5935-01-441-0087
NSN 2925-00-918-0859
NSN 5905-01-296-1127