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 6130-01-201-9914
NSN 2925-01-586-9280
NSN 6620-01-142-7376
NSN 6135-01-619-6293
NSN 6110-01-462-1698
NSN 5945-01-650-0190
NSN 5965-01-603-0118
NSN 5990-01-432-4984
NSN 5990-01-414-2071
NSN 5915-00-334-3008
NSN 5975-01-589-5329
NSN 5950-01-150-1771