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 6320-01-021-6633
NSN 7035-01-045-7202
NSN 5996-01-541-1174
NSN 7035-01-351-4111
NSN 5999-01-478-3529
NSN 5905-01-450-5794
NSN 5985-00-686-7663
NSN 5960-00-470-2570
NSN 6320-00-405-2348
NSN 6645-00-772-0532
NSN 6135-01-604-8739
NSN 5920-00-288-5849