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 5998-00-296-3570
NSN 6105-01-085-0698
NSN 6105-01-134-0455
NSN 5895-01-378-8686
NSN 6130-01-551-6189
NSN 5975-00-078-9117
NSN 6240-00-514-3507
NSN 5915-00-846-3733
NSN 6135-01-202-8113
NSN 6620-00-360-4460
NSN 5960-00-908-8658
NSN 6685-00-088-8285