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 5920-01-243-0611
NSN 5915-00-137-4486
NSN 6130-01-332-8966
NSN 6645-01-407-0204
NSN 5925-01-119-2406
NSN 6645-00-348-2841
NSN 6610-01-192-6478
NSN 5945-01-442-7796
NSN 6685-01-630-2177
NSN 6685-00-220-2892
NSN 5998-01-406-8920
NSN 5975-00-909-5174