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.)
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NATO Maintenance and Supply Agency Classification: Nuts of iron or steel
NSN 5975-00-390-5753
NSN 5925-01-634-0664
NSN 6645-00-843-8837
NSN 5930-01-274-3027
NSN 6150-01-573-1342
NSN 6145-00-578-7522
NSN 5950-01-569-3353
NSN 6610-00-318-5735
NSN 5950-01-071-4662
NSN 5915-01-183-0081
NSN 6610-00-303-9647
NSN 4140-00-802-2968