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 6620-01-466-9478
NSN 5910-01-438-3848
NSN 6610-00-584-5055
NSN 5996-00-200-5610
NSN 6645-01-613-2053
NSN 6145-01-442-6436
NSN 6240-00-518-3541
NSN 5930-01-221-8353
NSN 2925-01-518-3453
NSN 5920-00-271-3217
NSN 5930-01-125-7319
NSN 5945-01-484-9325