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 5960-01-560-8461
NSN 6645-01-502-3068
NSN 6320-00-725-0754
NSN 6685-00-223-5816
NSN 5935-01-531-9452
NSN 5855-00-991-0096
NSN 5975-01-166-7551
NSN 5960-00-553-7338
NSN 5905-01-471-5436
NSN 5945-01-580-2128
NSN 6620-01-583-8155
NSN 5999-01-275-7339