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 6320-01-446-5985
NSN 5905-01-501-6363
NSN 5925-00-833-6028
NSN 5960-01-505-2426
NSN 5990-01-442-3520
NSN 5920-01-303-5951
NSN 5835-00-987-9341
NSN 5999-00-107-5622
NSN 6650-00-792-8577
NSN 5999-00-340-6900
NSN 6645-01-564-7129
NSN 5915-01-415-3100