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 6650-01-328-0546
NSN 5975-00-880-6285
NSN 6135-01-548-1423
NSN 5965-00-932-4591
NSN 6645-01-128-6932
NSN 5925-01-565-2648
NSN 5998-00-596-6271
NSN 6105-01-512-8752
NSN 6105-00-972-3042
NSN 5915-00-530-5067
NSN 6610-00-186-9180
NSN 6645-01-112-3242