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 5950-00-406-0287
NSN 5998-01-220-2253
NSN 6220-01-415-5698
NSN 5925-00-330-8778
NSN 5960-00-925-2111
NSN 5925-00-133-2963
NSN 6620-01-369-4627
NSN 5998-01-598-8420
NSN 5905-00-185-6237
NSN 5945-00-136-1877
NSN 5895-00-081-7836
NSN 5996-01-442-3676