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 5950-00-139-9027
NSN 6320-01-643-0850
NSN 5835-01-360-2657
NSN 5895-00-106-1239
NSN 5996-01-202-1392
NSN 5996-00-450-4807
NSN 5975-01-151-0299
NSN 5920-01-400-3562
NSN 2925-01-619-4825
NSN 6320-00-174-1362
NSN 6645-01-660-3097
NSN 6650-01-115-7981