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 4140-01-481-7019
NSN 5999-01-356-2862
NSN 6685-01-130-3471
NSN 5945-01-175-9367
NSN 6150-01-484-9299
NSN 4140-00-195-6230
NSN 6105-01-029-1140
NSN 5915-01-176-5602
NSN 7035-00-500-7839
NSN 5985-01-350-5228
NSN 5975-00-954-6641
NSN 6135-01-026-9960