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 6130-00-952-9037
NSN 5835-01-447-2544
NSN 5950-01-099-1683
NSN 4140-00-999-2577
NSN 6135-01-180-9611
NSN 5895-00-763-6246
NSN 6240-00-952-1906
NSN 6645-01-501-0576
NSN 6685-00-124-4336
NSN 5935-01-089-7125
NSN 5999-00-161-7849
NSN 6610-01-430-5373