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 5999-01-056-4490
NSN 5990-00-830-5051
NSN 6135-01-142-2417
NSN 5920-00-898-3090
NSN 5935-01-394-5187
NSN 5935-01-653-0119
NSN 6220-01-612-5894
NSN 5905-01-275-8971
NSN 6620-01-621-0719
NSN 5920-00-228-7919
NSN 6110-01-451-5089
NSN 5950-01-442-6188