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 5910-01-377-5761
NSN 6610-01-335-1660
NSN 5910-00-721-2274
NSN 5930-01-236-6522
NSN 5965-01-525-4597
NSN 6130-00-253-7311
NSN 6150-01-052-5966
NSN 5998-01-192-4162
NSN 6145-00-548-7195
NSN 5950-01-389-7121
NSN 5999-01-150-7127
NSN 6105-00-909-0215