A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6610-01-533-2935
NSN 5910-01-357-4966
NSN 5960-01-531-4845
NSN 6685-01-386-5129
NSN 5930-00-240-6008
NSN 5920-01-398-1626
NSN 5960-00-785-4274
NSN 5920-01-285-5674
NSN 5930-01-281-8464
NSN 5965-01-442-9749
NSN 5930-01-497-4898
NSN 5855-01-261-5495