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 6685-00-900-5428
NSN 6150-01-240-6261
NSN 6240-01-659-7888
NSN 5895-01-349-0619
NSN 6610-01-120-7670
NSN 6650-01-061-2750
NSN 6220-01-026-7260
NSN 6240-01-374-1904
NSN 5965-01-633-8849
NSN 5975-01-461-9556
NSN 5996-01-584-4539
NSN 5910-00-071-5682