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 6150-01-004-4555
NSN 6105-01-421-5432
NSN 5925-01-366-3570
NSN 5950-00-492-1037
NSN 5975-00-301-1537
NSN 5965-00-147-3070
NSN 6685-01-579-3636
NSN 6130-01-182-1557
NSN 5925-01-167-9769
NSN 5895-00-596-8678
NSN 5965-01-150-1920
NSN 6240-01-386-5952