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 5985-01-310-3121
NSN 5996-00-392-7626
NSN 6610-00-227-8846
NSN 5930-00-003-1631
NSN 5950-01-601-4026
NSN 6240-01-067-6457
NSN 6320-01-564-0893
NSN 5930-00-859-5278
NSN 5990-00-334-8836
NSN 6150-00-570-0552
NSN 6220-01-422-6949
NSN 6135-01-538-7086