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 5990-01-187-8594
NSN 6610-00-565-9758
NSN 6145-01-430-0099
NSN 5905-01-352-0256
NSN 6650-01-642-5803
NSN
NSN 5915-00-556-6163
NSN 6620-01-633-8443
NSN 6610-00-285-5366
NSN 6145-01-548-5812
NSN 6685-00-958-1860
NSN 6110-01-028-6169