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 6150-01-291-8860
NSN 5915-01-659-3434
NSN 6685-01-191-5819
NSN 6610-00-671-8215
NSN 6610-01-577-5404
NSN 6620-00-226-2285
NSN 5998-00-483-1920
NSN 5930-01-375-2426
NSN 7035-01-158-8860
NSN 6110-01-051-4196
NSN 5905-01-213-0686
NSN 6135-00-856-1343