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 6110-01-560-5080
NSN 5895-01-021-0390
NSN 5950-01-157-2796
NSN 6240-00-316-3167
NSN 5998-01-020-0556
NSN 6610-00-863-5403
NSN 5990-01-083-2430
NSN 5925-00-064-9873
NSN 4140-00-021-4021
NSN 5920-01-474-5404
NSN 2925-01-014-8007
NSN 6150-01-214-2462