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 5855-00-320-4116
NSN 6645-01-044-6376
NSN 6150-01-610-0379
NSN 6685-01-091-3282
NSN 5920-01-325-4604
NSN 5950-01-401-5321
NSN 5950-01-122-1360
NSN 5996-00-411-7119
NSN 6240-01-317-1382
NSN 5985-00-830-6252
NSN 5895-01-481-7625
NSN 7035-01-372-5006