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 6150-01-113-8204
NSN 6685-01-477-9516
NSN 6110-01-512-9520
NSN 6320-01-355-3998
NSN 5998-00-261-5411
NSN 6145-01-611-2412
NSN 6685-01-346-7677
NSN 6105-01-259-6879
NSN 5945-01-492-6208
NSN 6610-01-198-3862
NSN 5855-01-085-5354
NSN 6135-00-209-6918