A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 6150-00-061-3106
NSN 5990-01-633-9503
NSN 5905-01-408-9478
NSN 6240-00-777-8535
NSN 5996-01-104-3031
NSN 5996-00-499-7350
NSN 5925-01-538-4747
NSN 5985-00-174-3572
NSN 5945-00-473-0508
NSN 5945-01-424-5780
NSN 6145-01-428-7754
NSN 4140-00-848-6245