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 5835-01-116-2369
NSN 5996-01-539-5995
NSN 5895-01-455-9642
NSN 6145-00-267-9617
NSN 6620-01-315-1857
NSN 2925-01-111-2927
NSN 5998-01-007-0738
NSN 5935-01-161-9670
NSN 5905-00-460-1203
NSN 6620-01-296-9803
NSN 6645-00-400-3115
NSN 6645-00-339-0318