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 5835-00-907-0777
NSN 6320-01-316-2190
NSN 5999-01-317-4331
NSN 5835-01-366-5907
NSN 5930-01-093-8877
NSN 6320-00-360-1744
NSN 5999-01-287-2377
NSN 5975-00-581-1443
NSN 5945-01-166-5239
NSN 5975-01-318-4742
NSN 5895-01-153-2249
NSN 6130-01-213-2266