A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-626-2992
NSN 6645-00-920-8690
NSN 5965-01-465-4370
NSN 6240-01-169-1686
NSN 5950-00-467-0075
NSN 5999-01-285-6633
NSN 6645-00-248-5434
NSN 6220-01-463-8673
NSN 6145-00-900-7081
NSN 5915-01-467-4468
NSN 5985-01-212-0261
NSN 6320-01-006-6138