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 5855-00-904-0684
NSN 5999-01-432-1564
NSN 5925-00-972-3000
NSN 7035-01-437-4137
NSN 6105-00-822-3648
NSN 5920-01-086-3258
NSN 5998-00-197-5849
NSN 6610-00-811-6072
NSN 6610-00-128-7780
NSN 6220-01-210-9793
NSN 6645-00-470-5310
NSN 6685-01-176-0413