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 6320-00-731-6134
NSN 4140-01-500-8334
NSN 5855-01-537-3481
NSN 5920-01-286-2597
NSN 6135-01-168-2944
NSN 5915-01-384-7010
NSN 5996-01-480-8956
NSN 5905-01-367-9808
NSN 5895-00-518-4954
NSN 6145-01-452-8545
NSN 5920-01-401-5315
NSN 5950-00-224-6150