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 6240-01-297-8656
NSN 6135-00-985-7887
NSN 6620-01-369-3589
NSN 6620-01-207-0667
NSN 5905-01-076-3145
NSN 6240-01-304-2798
NSN 5920-01-510-9921
NSN 6130-01-030-6406
NSN 5990-01-516-6791
NSN 5920-01-267-5306
NSN 6645-01-142-2416
NSN 6105-01-307-9872