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 5835-01-381-9565
NSN 5855-01-351-2541
NSN 6220-00-148-7283
NSN 6130-01-349-8603
NSN 6685-01-467-4166
NSN 5990-01-400-3299
NSN 6610-00-140-1719
NSN 5895-01-158-2879
NSN 5915-01-653-4819
NSN 5945-01-250-1504
NSN 5895-01-380-9787
NSN 6620-01-234-1799