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 5998-01-312-9048
NSN 5920-01-247-9196
NSN 6620-01-083-4672
NSN 5930-01-481-6217
NSN 5905-00-233-7653
NSN 6135-01-070-3865
NSN 5935-00-466-2845
NSN 6130-01-548-5371
NSN 5975-00-404-7476
NSN 5925-01-303-8381
NSN 6105-00-660-8882
NSN 5965-01-250-5768