Used on c130 hercules
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 6610-00-244-2816
NSN 6130-01-054-1474
NSN 5835-01-059-1550
NSN 6145-01-530-7171
NSN 6620-01-262-2205
NSN 6220-01-063-9543
NSN 5905-00-872-0492
NSN 5920-00-931-7979
NSN 5920-01-448-5436
NSN 5965-01-049-8307
NSN 6135-00-985-7845
NSN 5998-00-827-0527