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 6145-01-276-3415
NSN 5855-01-027-1571
NSN 5998-00-938-8806
NSN 5950-01-366-4611
NSN 5985-01-650-6521
NSN 2925-00-860-3652
NSN 5895-01-035-1166
NSN 5930-01-519-9318
NSN 5998-00-992-1610
NSN 6240-01-258-5829
NSN 5895-01-272-8881
NSN 5999-01-360-0593