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 5935-01-557-1966
NSN 5975-01-196-0485
NSN 5950-01-464-4196
NSN 6620-00-956-2605
NSN 6645-01-422-9672
NSN 6130-00-633-6187
NSN 5835-00-498-8189
NSN 5975-00-737-7684
NSN 6105-01-449-4504
NSN 6110-01-299-1655
NSN 7035-01-499-6171
NSN 6620-01-423-0833