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 6220-01-168-9383
NSN 6220-01-253-0380
NSN 5965-00-762-0630
NSN 6240-00-987-0977
NSN 5950-00-432-9415
NSN 5855-00-149-0766
NSN 6645-01-435-4073
NSN 5855-01-533-0996
NSN 6150-01-466-1334
NSN 5990-00-451-7630
NSN 7035-00-541-8516
NSN 5998-01-304-7619