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 5920-01-150-3499
NSN 6320-01-631-7828
NSN 6650-01-190-7050
NSN 5990-01-136-4068
NSN 5975-01-498-2089
NSN 6105-00-631-5296
NSN 5975-01-536-9993
NSN 6135-00-938-1351
NSN 6620-01-294-1044
NSN 5999-01-543-5932
NSN 5990-00-103-0528
NSN 5998-00-009-7658