Groove 0.062 in. W by 0.031 in. Deep in outside surface
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 5835-01-279-2580
NSN 5985-00-143-8134
NSN 6150-01-533-5976
NSN 6610-01-146-0331
NSN 6220-01-512-0144
NSN 4140-01-045-9290
NSN 5985-01-218-5643
NSN 5965-01-587-2366
NSN 6220-01-363-9713
NSN 6645-00-725-6864
NSN 6685-01-195-3360
NSN 2925-01-329-3665