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 5895-01-041-7053
NSN 5975-00-927-9538
NSN 6320-01-177-3192
NSN 5990-00-952-7100
NSN 5990-00-574-5777
NSN 6610-00-176-5486
NSN 6135-01-567-0739
NSN 5855-01-268-6468
NSN 6145-00-933-0556
NSN 5915-01-654-9286
NSN 5905-00-188-8417
NSN 6105-01-285-5690