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 5960-01-222-4199
NSN 6135-00-767-0331
NSN 5945-01-030-1261
NSN 6130-00-932-1591
NSN 5960-00-131-6744
NSN 5945-01-051-0540
NSN 5965-01-377-3587
NSN 6610-01-281-7536
NSN 5990-01-534-8609
NSN 5945-01-063-8198
NSN 7035-00-897-7567
NSN 5960-01-560-8461