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 6145-01-088-3461
NSN 6320-01-266-1612
NSN 5990-01-123-6557
NSN 6610-01-220-5262
NSN 5915-00-421-7825
NSN 4140-01-032-3705
NSN 5998-00-661-0380
NSN 6610-00-226-4710
NSN 6130-01-596-3779
NSN 6220-01-334-8306
NSN 6240-01-233-2334
NSN 6240-01-544-9579