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 6645-00-891-1531
NSN 5935-01-303-8777
NSN 5925-01-122-7983
NSN 5945-01-207-1732
NSN 6320-01-443-3826
NSN 5930-01-381-6277
NSN 5960-01-632-6576
NSN 6620-00-244-0965
NSN 5965-00-150-1144
NSN 6150-01-054-0918
NSN 6240-01-357-7925
NSN 5905-01-160-7546