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 6620-00-735-2892
NSN 5960-01-365-8752
NSN 6320-00-553-8427
NSN 5915-00-647-2312
NSN 6150-01-250-9173
NSN 4140-01-048-4424
NSN 5945-01-338-5490
NSN 6240-01-072-1097
NSN 6610-00-352-7004
NSN 5996-01-329-7161
NSN 7035-01-073-5233
NSN 5960-00-441-5147