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 5990-01-263-0362
NSN 5999-01-611-0403
NSN 6320-01-066-1766
NSN 5910-01-212-5903
NSN 6145-00-754-8372
NSN 5965-00-275-0491
NSN 7035-00-834-2090
NSN 6620-01-605-2590
NSN 5999-00-248-7240
NSN 2925-01-004-5627
NSN 5985-00-369-9299
NSN 6150-01-518-3220