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 5905-01-120-3759
NSN 6645-01-432-1068
NSN 7035-00-225-6499
NSN 5985-01-439-1160
NSN 5960-00-038-5433
NSN 6135-01-278-9717
NSN 6610-01-276-7087
NSN 6650-00-011-3435
NSN 5998-01-278-2650
NSN 2925-01-295-9337
NSN 6610-00-227-8846
NSN 5996-01-383-0520