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 5910-01-541-4922
NSN 5855-01-058-5576
NSN 4140-00-218-3579
NSN 6685-01-446-7300
NSN 6320-00-483-0451
NSN 5925-00-295-6255
NSN 5930-00-137-2718
NSN 5925-01-350-4295
NSN 6650-01-052-2143
NSN 6240-00-097-8505
NSN 6150-00-331-6351
NSN 6610-01-263-5517