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 5905-00-466-3619
NSN 5910-01-459-8500
NSN 6650-00-170-5095
NSN 5945-00-290-1779
NSN 5996-00-275-9206
NSN 5855-00-494-9581
NSN 4140-01-353-2205
NSN 5895-00-981-9838
NSN 5930-01-267-2840
NSN 5895-00-826-9004
NSN 6620-01-611-7907
NSN 6685-00-227-6750