Square nut; heavy
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 5990-01-223-6321
NSN 6320-01-600-5808
NSN 5975-01-144-4555
NSN 6145-01-589-0611
NSN 6110-01-323-9910
NSN 6130-01-196-8528
NSN 5910-01-410-7749
NSN 5960-01-525-1690
NSN 5996-01-513-7718
NSN 5950-01-077-5706
NSN 5930-01-539-7914
NSN 5895-01-262-9660