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 5990-00-840-6571
NSN 5965-01-195-2168
NSN 5930-00-875-4857
NSN 6150-00-031-3647
NSN 6610-00-788-0134
NSN 5985-00-552-9705
NSN 5915-00-584-3512
NSN 5925-01-160-0071
NSN 6685-01-278-2981
NSN 5925-00-912-6493
NSN 4140-01-146-4474
NSN 6320-01-379-1182