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 5915-00-328-9663
NSN 5975-01-215-1205
NSN 6135-01-100-3593
NSN 5975-01-318-2614
NSN 5855-00-832-9341
NSN 6130-01-537-4889
NSN 5945-01-616-9630
NSN 5925-01-546-2708
NSN 2925-00-922-8953
NSN 5985-00-869-5347
NSN 5930-01-242-5766
NSN 5990-01-395-4194