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 6650-01-630-3410
NSN 5950-00-890-5856
NSN 6240-01-385-7079
NSN 5895-00-373-2743
NSN 5960-00-529-2704
NSN 6610-01-363-9745
NSN 6135-01-027-7543
NSN 5945-01-474-7584
NSN 5910-01-042-7757
NSN 6110-01-506-6779
NSN 5945-01-185-6128
NSN 6220-00-343-0182