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 5855-01-068-3683
NSN 6240-01-113-6412
NSN 4140-00-108-5688
NSN 5930-00-057-1583
NSN 7035-01-441-9509
NSN 5945-01-435-5874
NSN 6130-00-991-0566
NSN 6220-01-500-2188
NSN 5925-00-150-1072
NSN 6105-00-862-6805
NSN 5910-00-520-9256
NSN 5925-00-232-3256