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 5985-00-665-8384
NSN 5975-00-736-3420
NSN 5920-01-283-0735
NSN 5990-01-539-3493
NSN 6130-01-373-6557
NSN 6610-01-020-3764
NSN 6610-00-851-8727
NSN 5925-01-058-6079
NSN 5930-01-655-5160
NSN 5998-01-522-7223
NSN 6620-01-471-8128
NSN 5965-00-617-5731