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 5905-00-979-4344
NSN 6130-01-377-3380
NSN 6130-01-295-7215
NSN 6150-01-425-0611
NSN 5910-01-496-4996
NSN 2925-01-500-0730
NSN 4140-00-812-2669
NSN 5925-01-486-1239
NSN 5950-01-417-8415
NSN 5925-00-167-7513
NSN 5975-01-194-1237
NSN 5835-00-140-8646