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 6610-01-287-9814
NSN 2925-00-705-5180
NSN 5960-01-399-4327
NSN 6685-01-070-8888
NSN 6320-01-029-4220
NSN 6105-01-585-2502
NSN 6150-01-513-2036
NSN 5915-00-146-5358
NSN 5895-01-476-5548
NSN 5965-00-529-0602
NSN 5920-01-370-5521
NSN 5945-01-656-0764