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 6320-00-036-3688
NSN 5990-00-948-9245
NSN 6145-01-159-1180
NSN 5920-00-610-3209
NSN 6240-01-581-7141
NSN 6150-00-403-7332
NSN 6135-01-196-7399
NSN 6135-00-985-7846
NSN 6150-01-605-3392
NSN 5990-01-072-6074
NSN 6650-01-257-4724
NSN 6105-01-114-4452