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 5998-00-109-0963
NSN 5996-00-932-5301
NSN 6135-00-930-5372
NSN 6620-00-153-0982
NSN 5910-00-556-6209
NSN 5945-01-270-0922
NSN 5930-01-650-4254
NSN 6620-00-701-3575
NSN 5925-00-880-8379
NSN 6645-01-508-9074
NSN 6220-01-449-2014
NSN 2925-00-404-6461