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 6650-01-134-8933
NSN 6650-01-381-3542
NSN 5925-00-929-0871
NSN 5935-01-581-0160
NSN 5990-00-081-3937
NSN 6240-00-300-9016
NSN 6610-01-643-6652
NSN 6620-01-087-4361
NSN 5990-00-045-7929
NSN 6130-01-658-1144
NSN 5990-01-054-3332
NSN 6110-00-299-0260