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 5910-01-142-9577
NSN 5855-01-361-2362
NSN 6135-01-443-7716
NSN 6610-01-237-5815
NSN 5990-01-227-6526
NSN 6610-01-576-8955
NSN 5905-00-514-9152
NSN 6150-00-342-9765
NSN 5835-00-222-3956
NSN 5915-00-099-0347
NSN 6110-01-519-3813
NSN 7035-01-241-2127