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 5990-01-134-2859
NSN 5895-01-258-6711
NSN 6650-00-161-4122
NSN 5915-01-056-4698
NSN 6650-01-004-1261
NSN 5930-00-177-3316
NSN 2925-01-430-4206
NSN 6685-00-171-4473
NSN 5950-01-585-1022
NSN 6110-01-361-8949
NSN 5905-01-407-8069
NSN 7035-01-014-3808