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 6220-00-890-4960
NSN 5975-00-051-5018
NSN 6645-00-815-7075
NSN 6220-00-654-7362
NSN 6130-00-967-0475
NSN 5930-00-596-8115
NSN 5895-01-231-6833
NSN 6145-01-564-2556
NSN 6620-00-830-3554
NSN 5930-00-208-5831
NSN 6685-01-398-9807
NSN 6105-01-437-8341