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 6145-00-547-0920
NSN 6620-01-214-7520
NSN 5985-01-584-6231
NSN 6130-01-090-0894
NSN 6645-01-387-2063
NSN 5999-01-443-4023
NSN 7035-01-246-9936
NSN 5835-01-535-0948
NSN 5965-01-565-6976
NSN 5998-01-563-4159
NSN 6130-00-212-4883
NSN 6610-00-504-2839