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 6645-01-217-2888
NSN 5990-00-766-7179
NSN 5999-01-020-3172
NSN 5975-00-934-8885
NSN 6610-00-151-7976
NSN 5945-01-112-6042
NSN 6220-01-607-4046
NSN 5950-01-490-5609
NSN 5960-00-232-2512
NSN 6220-01-113-9952
NSN 5950-01-491-0158
NSN 5905-00-724-4481