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 5905-01-533-6638
NSN 2925-00-149-0760
NSN 6620-00-248-6950
NSN 5990-00-004-4158
NSN 6110-01-441-9617
NSN 5999-00-520-9292
NSN 6145-00-170-6467
NSN 6130-01-019-0823
NSN 6610-01-515-3363
NSN 5990-01-288-7393
NSN 6110-01-255-3354
NSN 5920-01-412-1080