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 5998-01-032-4391
NSN 5950-01-634-0677
NSN 5925-00-642-5253
NSN 6150-00-761-8705
NSN 5930-01-339-1832
NSN 5990-00-170-9553
NSN 6610-01-442-2213
NSN 5996-00-010-8112
NSN 5915-00-318-3246
NSN 6130-01-342-4762
NSN 5996-01-184-9442
NSN 6610-01-291-4173