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 6145-01-479-9712
NSN 6650-01-372-3730
NSN 6135-01-350-2932
NSN 6150-01-568-1369
NSN 6320-01-659-2819
NSN 5960-00-148-4492
NSN 6320-01-643-0850
NSN 6645-01-053-3185
NSN 5915-01-327-3617
NSN 5930-01-188-6190
NSN 5965-01-289-6436
NSN 5910-00-841-6400