Special Features:

Material is a steel alloy; nut is irregularly shaped in that it has a head height of only 0.312 inches of the total height and has a protruding shaft of 0.745 inch diameter complimenting the remainder of the height, with a hollowed out portion under the head (cupped) beginning 0.125 inches from outer diameter and to the shaft

Properties:

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.)