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 6620-00-952-4278
NSN 5945-01-148-3265
NSN 6610-01-156-0810
NSN 6620-01-420-7465
NSN 5998-01-100-1116
NSN 2925-01-129-1261
NSN 6645-00-064-1180
NSN 5975-01-444-2842
NSN 6220-01-236-9816
NSN 6150-01-470-2349
NSN 2925-00-149-0760
NSN 5915-01-104-5992