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 6650-01-187-3364
NSN 5935-01-525-6891
NSN 5965-00-615-7118
NSN 6650-01-381-1359
NSN 5915-01-056-5141
NSN 5935-01-543-5982
NSN 6220-01-649-1515
NSN 6685-01-353-1192
NSN 5999-01-303-6569
NSN 5999-00-837-5828
NSN 6105-01-014-1962
NSN 5999-00-817-4122