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 6610-00-406-3107
NSN 5999-01-050-2329
NSN 5905-01-205-1725
NSN 5945-01-049-9517
NSN 5855-01-060-2820
NSN 5835-01-541-9991
NSN 6645-01-324-8185
NSN 5930-01-342-6244
NSN 5975-00-455-2431
NSN 5855-00-288-1408
NSN 6610-00-186-3433
NSN 5975-00-020-3271