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 5920-01-252-4406
NSN 6240-01-342-1588
NSN 5910-01-012-3997
NSN 5965-01-605-0090
NSN 5930-01-443-1518
NSN 6645-01-179-0243
NSN 5895-00-820-1997
NSN 5960-01-023-8037
NSN 6130-00-160-4721
NSN 6685-01-120-5420
NSN 6110-00-233-6626
NSN 6620-01-557-6512