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 5996-01-474-6834
NSN 6645-01-620-2407
NSN 6150-01-400-4211
NSN 5925-00-840-0255
NSN 6320-01-247-0898
NSN 5925-01-451-3584
NSN 6650-01-612-1832
NSN 5835-01-485-0210
NSN 6130-00-815-8430
NSN 6645-01-294-6403
NSN 6685-01-406-5348
NSN 5910-01-476-1649