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 5905-01-160-2983
NSN 6130-01-449-1088
NSN 5999-00-913-1280
NSN 5925-01-503-6177
NSN 6610-01-382-1472
NSN 6135-00-299-6918
NSN 5950-01-423-1560
NSN 5895-01-230-0266
NSN 5990-01-261-2962
NSN 5910-00-168-1026
NSN 5990-01-147-5225
NSN 2925-01-587-3956