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 6110-01-212-0581
NSN 5960-01-282-2386
NSN 6685-00-540-9017
NSN 5975-01-097-4705
NSN 5835-01-020-2262
NSN 5925-01-256-6176
NSN 5855-01-250-2421
NSN 6240-01-529-6624
NSN 5975-01-038-4851
NSN 5905-00-266-0948
NSN 5975-01-433-2169
NSN 5996-01-143-5779