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 7035-01-523-4803
NSN 5960-01-570-8605
NSN 6620-01-400-2221
NSN 6130-01-449-1178
NSN 5975-00-322-9865
NSN 6320-00-701-0437
NSN 5925-01-614-0838
NSN 5925-00-536-7651
NSN 6220-01-388-0823
NSN 7035-01-157-0028
NSN 5835-00-995-0277
NSN 6110-00-961-5204