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 6130-00-438-3905
NSN 5950-01-128-3975
NSN 5965-01-306-0258
NSN 6650-01-203-1632
NSN 5960-01-486-8919
NSN 6645-00-057-3499
NSN 5999-00-177-3383
NSN 5960-00-838-1360
NSN 6135-00-284-1406
NSN 5925-01-589-3658
NSN 6150-01-198-1561
NSN 6645-01-363-9790