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 5975-01-559-2181
NSN 6620-00-010-8190
NSN 7035-01-357-3726
NSN 6610-00-516-4228
NSN 6320-01-072-2073
NSN 5925-00-853-6198
NSN 6130-00-792-4612
NSN 5945-01-175-2885
NSN 6130-01-157-3155
NSN 2925-00-233-5644
NSN 6130-01-533-0955
NSN 5920-00-510-7656