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 6130-00-202-4688
NSN 5855-00-832-9341
NSN 6320-00-299-3090
NSN 5915-01-589-0171
NSN 5990-01-180-7365
NSN 5975-01-501-6362
NSN 5915-00-837-2380
NSN 5920-01-338-1410
NSN 5915-01-152-2684
NSN 5915-00-917-7662
NSN 5945-01-207-1732
NSN 5855-01-161-8964