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 5910-00-517-0063
NSN 5905-01-651-3830
NSN 5935-00-628-7624
NSN 6645-00-557-0322
NSN 5975-01-017-7726
NSN 6135-00-125-5265
NSN 6685-00-775-8843
NSN 5905-00-221-4483
NSN 5999-01-478-6885
NSN 5999-00-283-3998
NSN 5960-01-283-7129
NSN 5835-00-816-0394