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 5855-01-316-9642
NSN 5999-01-349-7522
NSN 5999-00-610-5384
NSN 5895-01-011-3801
NSN 5990-01-507-1479
NSN 6105-01-514-7310
NSN 5855-01-398-0090
NSN 5996-01-059-4588
NSN 6150-00-636-0923
NSN 5925-01-218-5999
NSN 5985-01-026-7684
NSN 5935-01-471-8252