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 6130-01-003-1019
NSN 6650-01-435-1168
NSN 6220-00-681-2707
NSN 5965-00-578-8931
NSN 5835-00-994-5116
NSN 5996-01-100-3731
NSN 2925-01-647-7225
NSN 5905-00-186-9044
NSN 6685-00-328-5898
NSN 5950-00-672-3458
NSN 6240-01-548-2197
NSN 5910-00-081-2215