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 5915-01-549-4812
NSN 6620-01-462-5196
NSN 5960-00-281-0824
NSN 6130-01-655-6755
NSN 5965-01-184-2477
NSN 5945-01-043-7056
NSN 5985-01-098-7994
NSN 6105-01-510-4633
NSN 5975-00-514-8614
NSN 5975-00-938-3794
NSN 6130-01-643-0215
NSN 5975-00-529-3109