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 5950-01-349-8983
NSN 5915-00-449-7470
NSN 6645-00-222-2785
NSN 5985-01-634-0635
NSN 6105-01-160-3223
NSN 6105-00-966-5079
NSN 6135-00-816-9052
NSN 5935-01-066-1959
NSN 6620-00-010-8190
NSN 5990-01-127-1108
NSN 6645-01-480-3347
NSN 5855-01-074-2649