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 6150-00-053-9267
NSN 5950-00-833-3526
NSN 6110-00-761-2065
NSN 5915-01-144-3221
NSN 6240-01-032-9952
NSN 6145-01-172-5630
NSN 5945-00-436-8995
NSN 5905-01-216-6597
NSN 5910-01-506-0302
NSN 6610-01-484-8980
NSN 6685-01-359-8716
NSN 5835-00-454-7239