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 5935-00-058-2655
NSN 5950-01-067-2130
NSN 5990-01-534-8609
NSN 5998-01-273-1452
NSN 5905-01-107-2293
NSN 5950-01-121-4795
NSN 5975-01-159-9315
NSN 5895-00-246-4415
NSN 5905-01-643-8505
NSN 6220-00-218-0857
NSN 7035-01-354-9382
NSN 5915-01-398-9831