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 6620-01-423-7300
NSN 5925-01-600-0447
NSN 5996-00-900-8177
NSN 6620-01-125-3932
NSN 6220-00-391-1076
NSN 5910-01-253-2556
NSN 6220-00-122-3238
NSN 5905-01-562-0266
NSN 6650-01-329-8020
NSN 5910-01-307-5712
NSN 5960-00-014-0519
NSN 4140-01-194-2529