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 6645-01-563-8763
NSN 6645-01-307-8203
NSN 6145-01-188-9699
NSN 5999-01-418-2456
NSN 7035-01-595-5270
NSN 5950-01-644-2683
NSN 6110-01-169-2816
NSN 7035-00-981-7216
NSN 5895-00-837-3441
NSN 5950-01-092-9625
NSN 5835-00-216-4568
NSN 5975-00-870-6323