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 6145-01-124-8043
NSN 6610-01-389-3082
NSN 5915-00-256-0040
NSN 5965-00-513-1352
NSN 6110-01-263-2271
NSN 6130-01-474-5190
NSN 4140-00-955-5679
NSN 6145-01-422-0015
NSN 5990-00-613-2279
NSN 6220-00-433-9337
NSN 6645-00-401-5563
NSN 5965-00-779-9546