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 2925-00-288-1394
NSN 5985-01-067-8041
NSN 5915-00-271-2321
NSN 5998-01-322-6799
NSN 5855-01-258-5161
NSN 6645-01-656-5129
NSN 6685-00-204-3174
NSN 5945-01-283-6531
NSN 6620-01-046-8623
NSN 6685-00-478-7008
NSN 7035-00-541-8516
NSN 6145-01-251-5092