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 5960-01-114-8152
NSN 5915-01-605-3326
NSN 6240-01-474-3039
NSN 5998-00-082-3396
NSN 5930-00-398-1517
NSN 6110-01-399-3966
NSN 5905-01-397-4619
NSN 5990-00-582-0342
NSN 5975-00-497-9968
NSN 6650-00-859-1859
NSN 6645-00-542-1206
NSN 6145-00-925-4897