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 6220-01-302-4410
NSN 5950-01-145-9885
NSN 6220-01-316-2253
NSN 5999-01-200-9530
NSN 6610-01-448-8904
NSN 2925-01-535-7235
NSN 5990-01-114-5095
NSN 6620-01-046-8623
NSN 5920-01-322-6987
NSN 6135-01-497-4516
NSN 5950-00-115-3602
NSN 6320-01-279-0343