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 6645-01-430-2420
NSN 6110-01-485-8880
NSN 5975-01-247-2305
NSN 5965-01-134-3949
NSN 5950-01-333-8937
NSN 5930-01-327-3344
NSN 6685-00-198-9506
NSN 5985-01-548-6544
NSN 6150-01-135-0156
NSN 5990-01-252-8175
NSN 5965-01-492-5695
NSN 5998-01-040-8525