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 5950-00-617-7214
NSN 6645-00-255-1369
NSN 5965-01-063-7894
NSN 6645-01-104-6540
NSN 5895-01-367-6006
NSN 5905-00-188-8228
NSN 5960-01-167-8796
NSN 6610-01-431-8575
NSN 6150-00-596-9882
NSN 6645-01-317-6071
NSN 6135-00-738-5571
NSN 7035-01-329-8932