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 6135-00-702-2772
NSN 5855-01-380-9950
NSN 5895-00-869-1577
NSN 5895-01-370-4323
NSN 6220-00-247-4859
NSN 6110-01-530-0507
NSN 5985-00-880-5788
NSN 5835-00-752-1201
NSN 5990-01-061-4169
NSN 6610-00-144-7036
NSN 6610-00-575-7933
NSN 6610-00-221-6124