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 5998-01-185-5455
NSN 6610-01-626-2327
NSN 5950-00-974-6423
NSN 5925-01-583-4410
NSN 5945-01-227-5095
NSN 5930-01-519-9318
NSN 4140-00-205-6491
NSN 5895-01-424-5913
NSN 5999-01-206-9939
NSN 5915-01-373-8252
NSN 5920-00-771-7280
NSN 5895-01-199-7583