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 4140-01-215-1125
NSN 5855-01-395-0676
NSN 4140-01-263-2180
NSN 5855-01-501-5683
NSN 6150-01-642-0694
NSN 5920-01-438-0557
NSN 4140-01-067-0533
NSN 6105-01-555-8757
NSN 6645-00-846-9206
NSN 5915-01-536-7950
NSN 6145-01-200-7075
NSN 5950-01-610-5957