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 5999-01-442-9199
NSN 5996-01-579-6558
NSN 6685-00-932-4258
NSN 6320-01-462-2295
NSN 6110-01-089-8130
NSN 5975-01-339-6276
NSN 6150-00-944-6696
NSN 5835-01-158-6878
NSN 6220-00-492-7445
NSN 7035-01-143-0355
NSN 5835-01-306-5511
NSN 5910-01-167-9419