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 6145-00-903-2462
NSN 5960-00-519-9880
NSN 5915-00-403-0955
NSN 5985-00-980-4511
NSN 6320-00-310-1080
NSN 5945-01-454-1850
NSN 5855-01-364-1005
NSN 5999-01-324-4386
NSN 5920-00-057-3152
NSN 5990-01-213-6319
NSN 5905-00-805-5260
NSN 6150-01-496-7869