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 5920-00-201-4914
NSN 5835-01-474-1224
NSN 5855-00-294-7532
NSN 5945-01-337-5405
NSN 5935-01-177-6026
NSN 5925-01-270-7838
NSN 5950-00-670-7842
NSN 5965-01-353-4170
NSN 6320-00-539-9283
NSN 5998-00-654-5278
NSN 5910-01-284-9696
NSN 5975-01-631-6460