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 6620-01-158-5111
NSN 6105-00-838-9409
NSN 6105-01-434-3032
NSN 6145-01-097-5948
NSN 5950-01-323-6906
NSN 5990-01-607-3528
NSN 5835-01-362-0305
NSN 6110-00-565-5986
NSN 5990-00-821-6257
NSN 5935-01-516-0319
NSN 5835-01-548-7454
NSN 5920-01-305-5318