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 6320-01-481-7322
NSN 6620-01-624-3933
NSN 5950-01-394-3357
NSN 5975-00-688-3433
NSN 5975-00-966-4323
NSN 5920-01-442-3395
NSN 5925-01-063-7107
NSN 5975-00-607-2403
NSN 5835-01-647-6426
NSN 6135-00-377-9165
NSN 5895-01-068-4355
NSN 6105-01-546-4547