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 2925-00-265-7539
NSN 5910-00-119-4498
NSN 6610-01-435-5425
NSN 5998-01-147-0609
NSN 5915-01-034-9461
NSN 5950-01-172-4124
NSN 5945-00-420-7774
NSN 6135-01-184-0727
NSN 5930-01-588-3103
NSN 4140-01-201-0534
NSN 6110-01-388-2958
NSN 5910-01-413-4420