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 5975-01-123-9111
NSN 5999-01-579-6338
NSN 7035-01-608-6811
NSN 6610-01-389-3082
NSN 6105-01-481-5622
NSN 6145-01-353-6197
NSN 5998-00-541-8792
NSN 6685-01-113-2514
NSN 6130-01-234-4458
NSN 5999-00-684-6811
NSN 5960-01-476-5686
NSN 5915-01-488-9469