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 6240-01-569-8709
NSN 5985-01-424-0149
NSN 6645-01-450-0809
NSN 5910-01-486-7023
NSN 5925-01-184-0633
NSN 5990-00-478-6518
NSN 6610-01-272-9691
NSN 6150-00-093-5783
NSN 6145-01-436-2146
NSN 2925-00-203-8735
NSN 5996-01-226-0606
NSN 6220-00-349-6064