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 5855-01-483-2774
NSN 6135-01-372-6985
NSN 5915-01-204-8856
NSN 5975-01-523-5360
NSN 6685-01-400-4190
NSN 5835-00-326-9761
NSN 6610-00-141-0393
NSN 5990-01-054-4255
NSN 6645-00-884-5845
NSN 5999-01-540-8960
NSN 5998-01-601-7198
NSN 5935-01-470-0180