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 6150-01-354-8962
NSN 6685-01-246-5038
NSN 6105-01-542-9995
NSN 5920-00-406-2712
NSN 5945-01-326-2090
NSN 6610-00-946-6146
NSN 5990-01-421-3325
NSN 5999-01-064-8102
NSN 5905-00-671-3058
NSN 6135-00-056-6863
NSN 5855-01-188-4049
NSN 6110-00-446-6099