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 5960-00-932-3067
NSN 6685-01-661-1090
NSN 5950-01-401-5321
NSN 5930-00-051-1334
NSN 5975-00-852-2201
NSN 5945-00-878-4720
NSN 6610-01-350-7697
NSN 6220-00-004-1744
NSN 4140-01-016-3143
NSN 6645-01-389-1970
NSN 5910-00-014-2558
NSN 5905-00-818-7395