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 5930-00-937-2137
NSN 5990-00-316-4707
NSN 6110-01-510-5564
NSN 5835-00-341-5441
NSN 5990-01-305-7228
NSN 6135-00-885-6003
NSN 5945-01-415-0858
NSN 6145-00-267-9617
NSN 6220-00-378-1484
NSN 5990-01-084-8330
NSN 5950-01-176-0481
NSN 6320-00-164-4087