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 5910-00-617-4230
NSN 6150-01-480-3491
NSN 5915-01-564-8906
NSN 5985-01-481-9245
NSN 5910-00-418-4425
NSN 6135-01-527-5494
NSN 5930-00-276-9289
NSN 6110-01-105-2971
NSN 6650-01-393-4152
NSN 6620-01-411-4434
NSN 5835-01-185-1102
NSN 5905-01-459-0282