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 6685-00-371-5492
NSN 6610-00-824-3376
NSN 5905-01-062-2329
NSN 6220-01-460-1391
NSN 6645-01-413-0515
NSN 6610-00-273-9019
NSN 5915-01-470-3682
NSN 5925-00-011-7011
NSN 5965-00-139-4870
NSN 5920-00-658-7219
NSN 2925-01-623-9285
NSN 6645-00-434-8793