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 6150-01-628-0422
NSN 5925-00-165-0371
NSN 5855-01-282-4881
NSN 6320-01-108-5933
NSN 5965-01-101-9094
NSN 6220-01-568-6653
NSN 5930-01-346-3890
NSN 5990-01-373-1465
NSN 5945-00-725-5576
NSN 6620-01-122-0238
NSN 5999-00-887-6512
NSN 5985-00-580-0902