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 6610-01-435-4387
NSN 5835-01-174-4276
NSN 6220-00-826-7002
NSN 5895-01-625-9675
NSN 6150-00-447-1048
NSN 6610-01-184-3016
NSN 5960-01-389-9941
NSN 6105-01-321-7466
NSN 6645-01-528-7152
NSN 5930-01-359-8953
NSN 5998-00-097-0719
NSN 5998-00-908-1684