A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5975-01-361-1198
NSN 6650-00-391-8404
NSN 5920-01-442-7685
NSN 5935-01-107-9238
NSN 6645-00-107-2148
NSN 6105-00-085-5713
NSN 6240-00-099-8606
NSN 5990-00-201-1162
NSN 6135-00-856-1343
NSN 5935-00-314-4509
NSN 5930-01-612-5100
NSN 5999-01-275-9184