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 5915-01-654-4319
NSN 5960-01-553-4557
NSN 6240-01-112-7576
NSN 6320-01-377-5701
NSN 5905-00-175-8811
NSN 5945-01-160-5116
NSN 5915-01-554-1391
NSN 6150-01-104-2430
NSN 5930-01-532-7928
NSN 6105-01-152-4572
NSN 5920-01-640-9556
NSN 6150-01-194-4442