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 6610-01-193-8861
NSN 6610-01-406-4985
NSN 6610-01-262-3467
NSN 6620-01-371-1655
NSN 6135-01-142-6456
NSN 6150-00-986-8630
NSN 5930-00-995-2400
NSN 5835-01-432-4507
NSN 6145-00-661-0192
NSN 5925-00-517-8512
NSN 5999-00-770-9452
NSN 5996-01-477-6709