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 5935-01-237-3883
NSN 6610-00-614-7943
NSN 5998-01-282-6770
NSN 6150-01-652-5267
NSN 5950-00-617-7703
NSN 6110-00-501-5585
NSN 6150-00-802-1454
NSN 6240-01-544-9579
NSN 6645-01-500-0827
NSN 5965-00-396-3411
NSN 5855-00-256-5562
NSN 6620-00-267-5273