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 5945-01-279-3655
NSN 6650-01-366-2424
NSN 6130-01-062-9753
NSN 6320-00-070-4544
NSN 5965-00-215-5866
NSN 5960-00-973-0700
NSN 7035-00-931-9415
NSN 6650-01-321-2905
NSN 5960-01-067-9531
NSN 5985-01-273-8765
NSN 6645-00-143-1567
NSN 6135-01-551-0562