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 5975-01-163-2130
NSN 5996-00-280-8980
NSN 6240-00-801-5941
NSN 5999-01-629-8698
NSN 7035-01-227-2546
NSN 5996-01-490-6640
NSN 6150-01-530-0336
NSN 6220-01-279-6220
NSN 5910-01-161-4718
NSN 6105-01-362-9386
NSN 5975-01-400-4204
NSN 6610-00-944-2925