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 7035-01-210-5111
NSN 6620-01-069-8594
NSN 5935-01-139-6927
NSN 6645-01-196-6277
NSN 5935-01-341-7947
NSN 6105-01-580-0264
NSN 5910-01-607-0767
NSN 5990-01-364-8405
NSN 6145-01-195-5204
NSN 6150-01-528-6134
NSN 5960-00-584-4553
NSN 5985-01-464-3153