A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 4140-01-470-1359
NSN 5835-00-198-4936
NSN 5925-01-094-9653
NSN 6240-01-452-7006
NSN 6105-00-320-9679
NSN 5975-01-441-6564
NSN 5835-01-281-7281
NSN 5855-00-879-7245
NSN 5925-01-423-7429
NSN 5920-01-170-0127
NSN 6650-01-378-6075
NSN 5998-01-452-9574