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 6240-01-090-2280
NSN 6145-01-164-2380
NSN 5998-00-003-0488
NSN 5999-01-571-4947
NSN 6240-01-516-2324
NSN 6130-00-856-7285
NSN 6320-00-731-6134
NSN 5945-01-071-9645
NSN 5996-00-253-3788
NSN 5990-01-114-5095
NSN 5965-01-464-9885
NSN 5960-00-349-7650