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 5930-00-041-1387
NSN 5910-00-419-0330
NSN 5998-01-038-9500
NSN 5990-00-138-6775
NSN 6110-00-715-0960
NSN 6220-00-111-3188
NSN 5965-00-799-5490
NSN 4140-00-905-6570
NSN 7035-01-467-4539
NSN 5998-01-203-5879
NSN 5910-00-918-2979
NSN 6620-00-186-8220