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 5998-01-188-7554
NSN 2925-00-236-9986
NSN 5920-00-280-8348
NSN 6130-00-826-3207
NSN 5960-01-411-5217
NSN 5920-00-190-7466
NSN 5930-01-185-8432
NSN 6645-01-032-5337
NSN 5855-01-423-9921
NSN 5915-00-420-8370
NSN 5990-01-481-3080
NSN 5990-01-432-4249