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 5985-01-420-6942
NSN 5999-00-343-1896
NSN 6110-01-579-8397
NSN 6145-01-093-5259
NSN 5935-01-416-1508
NSN 6320-01-449-1014
NSN 6135-01-651-3210
NSN 6110-01-485-3312
NSN 6620-01-197-8207
NSN 7035-01-475-7837
NSN 5930-01-463-8579
NSN 5925-01-467-9910