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 5999-00-753-7450
NSN 6645-00-971-2023
NSN 6220-00-707-5044
NSN 5925-00-519-0631
NSN 6105-01-170-2638
NSN 5905-01-401-5325
NSN 5996-01-566-8996
NSN 5920-00-269-4060
NSN 4140-00-471-9577
NSN 6220-00-533-3936
NSN 5965-01-156-4478
NSN 5985-01-323-1730