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 5999-01-476-0881
NSN 5960-01-599-9821
NSN 5975-01-406-9970
NSN 5975-00-875-0935
NSN 6645-01-305-9135
NSN 5930-01-218-4690
NSN 4140-01-362-8017
NSN 6685-01-088-2619
NSN 5985-00-334-9245
NSN 5855-01-252-5424
NSN 6150-00-239-2651
NSN 5895-01-106-3532