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 6685-01-233-2489
NSN 5835-01-552-2643
NSN 6105-00-647-0825
NSN 6320-01-600-0787
NSN 5905-01-540-6243
NSN 5975-00-203-6020
NSN 6220-01-535-5181
NSN 6610-01-449-6676
NSN 5935-00-226-3980
NSN 6610-01-224-7675
NSN 5905-00-272-3476
NSN 5855-00-237-4088