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 5855-01-432-2487
NSN 5945-01-559-3777
NSN 5960-01-641-5493
NSN 5910-01-276-2437
NSN 6150-01-533-5296
NSN 5920-00-105-5574
NSN 5960-00-106-7247
NSN 5985-00-195-6090
NSN 5930-00-785-8325
NSN 6145-00-011-2390
NSN 6645-00-963-9491
NSN 6105-01-251-7320