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 5920-00-809-6438
NSN 5975-00-724-3147
NSN 6150-01-114-3211
NSN 6645-00-801-0950
NSN 5855-00-198-3197
NSN 6150-01-444-9037
NSN 6240-01-463-3132
NSN 5990-01-620-8768
NSN 6150-01-514-2700
NSN 5935-01-540-9997
NSN 5905-01-262-4597
NSN 6145-01-029-9026