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 5920-01-131-6436
NSN 5965-00-104-3121
NSN 6240-00-179-5043
NSN 5950-01-589-2148
NSN 2925-01-446-6976
NSN 6105-00-012-2392
NSN 6135-01-226-4071
NSN 5990-01-029-0868
NSN 5935-00-740-2207
NSN 6150-00-509-3650
NSN 6220-00-500-8555
NSN 5920-01-037-1505