A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5945-01-253-1672
NSN 5960-01-537-8161
NSN 2925-00-290-7052
NSN 6110-01-124-4999
NSN 6110-01-446-3282
NSN 6610-00-076-5613
NSN 5855-00-586-6255
NSN 5915-01-487-5452
NSN 5930-01-492-5818
NSN 5999-00-281-3900
NSN 5999-01-408-3683
NSN 5985-01-558-3252