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 6620-00-004-1374
NSN 6620-00-255-5962
NSN 5895-01-208-3669
NSN 6240-01-659-7888
NSN 5950-01-436-9839
NSN 6645-00-476-7176
NSN 7035-01-512-1826
NSN 6150-00-226-3545
NSN 6320-01-465-2028
NSN 6130-00-138-7799
NSN 5855-00-821-7512
NSN 5920-00-407-7652