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 6145-01-371-0648
NSN 5960-01-426-4242
NSN 6105-01-110-0732
NSN 6685-00-121-3346
NSN 4140-00-146-3269
NSN 7035-00-368-8761
NSN 5835-01-256-8006
NSN 7035-00-200-5162
NSN 5910-01-152-1882
NSN 6130-00-683-1011
NSN 6650-01-168-8451
NSN 6110-01-233-6637