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 5855-01-552-4759
NSN 5996-00-185-9376
NSN 5935-00-430-6581
NSN 6645-01-320-4138
NSN 5935-00-819-1420
NSN 5915-01-450-1408
NSN 6130-01-216-5918
NSN 5935-01-100-5488
NSN 5975-01-261-1652
NSN 5996-01-052-1693
NSN 6240-00-752-2581
NSN 5915-00-391-0163