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 4140-01-481-1696
NSN 5920-00-150-1148
NSN 2925-00-805-6481
NSN 5905-00-239-9931
NSN 5975-01-500-5011
NSN 5999-00-479-8178
NSN 5925-01-602-5714
NSN 5895-01-020-7771
NSN 5996-01-023-3317
NSN 5960-01-459-6665
NSN 5990-00-929-3216
NSN 5975-01-250-7120