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 6685-01-370-4142
NSN 5930-01-243-2501
NSN 6220-01-281-6063
NSN 5895-00-288-5878
NSN 5975-01-660-4219
NSN 5990-01-493-4039
NSN 6610-01-139-0174
NSN 5920-01-056-5284
NSN 6240-01-471-6014
NSN 5975-01-112-9397
NSN 6110-01-633-9660
NSN 5960-01-305-5449