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 6240-01-412-4603
NSN 5935-01-364-8509
NSN 5835-00-113-6090
NSN 5910-01-222-4356
NSN 5835-00-673-2885
NSN 5990-01-491-7692
NSN 5915-01-571-3925
NSN 5920-01-480-5778
NSN 5950-00-351-9481
NSN 5855-01-408-3154
NSN 5895-01-482-8615
NSN 2925-01-306-4228