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 5915-01-388-6524
NSN 6150-00-455-9463
NSN 6105-00-565-5917
NSN 5950-01-354-3227
NSN 5960-00-841-2716
NSN 6645-01-398-2505
NSN 6135-00-708-0892
NSN 6105-01-011-4535
NSN 5985-01-500-0880
NSN 7035-01-411-2900
NSN 4140-00-993-0071
NSN 5930-01-546-8039