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 6150-01-557-9739
NSN 5855-01-236-9645
NSN 2925-00-590-3450
NSN 7035-01-331-5614
NSN 5910-00-431-8185
NSN 6320-00-261-9136
NSN 5985-00-100-1296
NSN 5998-01-599-6858
NSN 4140-00-804-5667
NSN 5905-01-438-0237
NSN 5950-01-167-1616
NSN 6620-00-684-6771