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 6220-00-914-7035
NSN 6645-01-399-0661
NSN 6320-00-459-8973
NSN 6135-01-462-6040
NSN 2925-01-181-3972
NSN 5935-00-736-1288
NSN 6110-01-408-5621
NSN 6150-01-316-4881
NSN 6685-00-411-2367
NSN 5999-00-276-9299
NSN 5990-00-206-3753
NSN 5895-00-200-4346