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 5945-00-470-4299
NSN 6320-00-295-2854
NSN 4140-00-179-3977
NSN 6620-01-197-7665
NSN 5920-01-592-0161
NSN 5910-01-153-7229
NSN 5998-01-378-7104
NSN 5910-01-207-8904
NSN 5930-01-651-7137
NSN 5985-01-086-6913
NSN 7035-01-227-2546
NSN 6650-01-449-2334