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 2925-00-837-3948
NSN 4140-00-753-6888
NSN 5965-00-996-3541
NSN 5920-00-280-2748
NSN 5998-01-365-5420
NSN 5990-01-356-4259
NSN 5950-00-321-5709
NSN 6220-00-149-0977
NSN 5999-00-035-9288
NSN 6150-01-191-7757
NSN 6110-00-525-3418
NSN 5965-01-348-8302