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 5998-01-103-6575
NSN 5975-00-553-7151
NSN 5895-00-378-5587
NSN 6240-01-143-8976
NSN 5930-01-467-1154
NSN 5998-00-188-3809
NSN 6645-01-073-5302
NSN 6610-01-383-4458
NSN 6150-00-067-5957
NSN 6620-01-376-9182
NSN 5990-00-985-1334
NSN 5925-01-534-8060