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 2925-00-567-3643
NSN 6150-01-540-6627
NSN 5920-00-030-5712
NSN 5930-01-422-4262
NSN 5945-01-248-2208
NSN 6145-01-536-6484
NSN 6220-00-300-3595
NSN 6620-01-149-2842
NSN 6650-01-553-1853
NSN 5930-01-130-8254
NSN 5985-01-116-2604
NSN 2925-01-359-9818