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 5835-00-441-5004
NSN 5895-00-203-2379
NSN 6145-01-463-3281
NSN 5905-01-031-1278
NSN 5945-01-571-6997
NSN 6685-01-391-7559
NSN 5915-00-721-2204
NSN 6150-01-050-6726
NSN 6620-00-105-3312
NSN 6130-00-407-0644
NSN 6110-01-395-3421
NSN 5935-01-361-6401