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 6645-01-311-5481
NSN 5965-00-201-7479
NSN 5895-01-599-9308
NSN 5996-01-383-0520
NSN 5915-01-468-7714
NSN 6240-01-309-6003
NSN 6150-01-487-3374
NSN 6150-01-530-7352
NSN 5920-00-226-0227
NSN 6130-00-082-7872
NSN 5965-01-281-3895
NSN 5855-01-231-4945