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 5855-01-013-6864
NSN 6105-00-243-0507
NSN 5996-01-236-5286
NSN 5950-00-337-5647
NSN 6620-00-484-4662
NSN 5920-01-225-9341
NSN 4140-01-406-5344
NSN 6145-01-010-3402
NSN 6240-01-355-3240
NSN 6645-01-093-5015
NSN 6320-00-459-8973
NSN 5965-01-478-5291