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 5835-00-233-6327
NSN 5965-00-904-9103
NSN 6610-01-618-7038
NSN 6320-00-098-2858
NSN 5960-01-243-0007
NSN 6130-00-210-4195
NSN 6145-01-608-5493
NSN 5930-00-356-3240
NSN 6240-00-038-7540
NSN 6130-01-505-0360
NSN 6240-01-139-1066
NSN 5945-01-123-9879