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 5835-01-561-2959
NSN 5935-00-481-0940
NSN 6685-01-415-6959
NSN 5855-01-366-2429
NSN 6110-00-137-9544
NSN 5998-01-259-4680
NSN 5945-01-030-2143
NSN 6135-00-477-8847
NSN 6645-01-170-5402
NSN 5998-01-465-1372
NSN 5996-00-345-8025
NSN 6240-01-462-1874