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 5998-01-426-1574
NSN 5895-00-972-0554
NSN 6145-01-454-3944
NSN 5835-01-026-0670
NSN 6645-01-504-3394
NSN 5915-01-217-8396
NSN 6145-00-801-4621
NSN 6220-01-397-7416
NSN 5965-01-243-5494
NSN 6685-00-663-9000
NSN 6240-01-633-9357
NSN 6650-00-136-4923