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 7035-01-448-4740
NSN 6320-00-483-0451
NSN 5925-01-411-6028
NSN 6650-00-030-2257
NSN 6320-01-056-1164
NSN 5998-01-518-9539
NSN 7035-01-209-0045
NSN 6240-00-541-7032
NSN 6130-01-326-3142
NSN 6620-00-491-3818
NSN 6320-00-636-0922
NSN 6650-01-314-5073