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 6130-01-391-6758
NSN 6105-01-507-7754
NSN 6135-01-622-1296
NSN 5910-01-311-5316
NSN 5930-01-359-2598
NSN 5855-01-027-1571
NSN 6110-01-553-7103
NSN 6240-00-266-6258
NSN 5945-01-575-6390
NSN 6110-01-601-7825
NSN 5910-01-370-5329
NSN 5935-01-408-5922