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 5999-01-027-0177
NSN 6145-01-384-4477
NSN 5985-00-967-9997
NSN 6645-01-573-7603
NSN 6150-01-062-1459
NSN 5925-00-205-2767
NSN 6240-01-322-5521
NSN 6110-01-033-5184
NSN 6645-00-100-4931
NSN 6145-00-480-1113
NSN 5990-01-548-2151
NSN 5910-00-349-6223