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 5910-01-156-0752
NSN 6130-01-607-0945
NSN 5990-00-269-2226
NSN 5965-00-932-4591
NSN 6320-00-270-8222
NSN 5935-01-578-7658
NSN 5910-00-097-9546
NSN 6320-01-331-6947
NSN 2925-01-456-6840
NSN 5920-01-401-5315
NSN 5925-00-201-9663
NSN 5935-01-328-1710