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 5999-01-062-6401
NSN 6220-01-511-5148
NSN 5950-01-154-6388
NSN 6220-01-431-7319
NSN 5935-01-549-9734
NSN 6240-01-442-6770
NSN 5990-00-052-3143
NSN 6135-00-477-8847
NSN 6150-01-618-9370
NSN 5985-01-100-3195
NSN 5960-01-342-1961
NSN 6320-01-462-3555