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 6135-01-436-7733
NSN 5855-01-188-4049
NSN 5999-00-989-6819
NSN 6620-00-684-6771
NSN 7035-00-486-0367
NSN 7035-00-507-5380
NSN 6650-01-086-7003
NSN 5945-00-998-3137
NSN 5915-01-212-7188
NSN 5920-01-073-8713
NSN 7035-01-151-0265
NSN 5910-01-168-8008