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 5965-00-539-7778
NSN 6130-01-406-5158
NSN 6105-01-092-0706
NSN 5935-01-266-2878
NSN 5996-01-111-4145
NSN 5905-01-163-2201
NSN 6320-01-029-4220
NSN 5975-01-271-7490
NSN 6135-01-461-6521
NSN 6110-01-598-5418
NSN 7035-01-287-9817
NSN 6150-01-423-9371