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 5935-00-252-3008
NSN 5990-00-462-9112
NSN 6145-01-287-5854
NSN 6135-00-274-4037
NSN 5910-01-090-0453
NSN 6220-01-221-9429
NSN 6645-01-225-0453
NSN 5835-01-645-2892
NSN 5950-00-983-3943
NSN 5990-01-525-2250
NSN 6650-01-406-9852
NSN 5905-01-578-5607