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 4140-01-371-8032
NSN 5895-01-506-8149
NSN 6110-01-530-9429
NSN 5990-01-231-1214
NSN 6645-00-764-3355
NSN 5996-01-609-4765
NSN 6105-00-359-5300
NSN 5996-01-021-5814
NSN 5950-00-770-9422
NSN 2925-00-712-8180
NSN 6150-01-137-6279
NSN 7035-01-045-7202