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 5925-00-772-8168
NSN 6150-01-571-9652
NSN 5975-00-233-6301
NSN 5855-01-521-0266
NSN 5945-01-333-2867
NSN 6220-01-446-5115
NSN 5935-01-342-4915
NSN 5895-01-508-4051
NSN 6135-01-430-3119
NSN 6610-01-343-2609
NSN 5915-01-423-8561
NSN 2925-01-415-0264