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 5945-01-090-5338
NSN 5945-01-523-7123
NSN 6105-01-144-2055
NSN 5925-01-632-2420
NSN 6110-01-158-9418
NSN 6620-00-974-7595
NSN 5925-00-868-3117
NSN 4140-01-167-1368
NSN 4140-01-010-0615
NSN 5920-00-988-7898
NSN 5925-01-390-2150
NSN 7035-00-131-8219