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 5990-00-977-9261
NSN 5960-01-498-0572
NSN 5910-01-265-7669
NSN 6135-01-190-2628
NSN 5985-01-542-8791
NSN 6320-00-845-3261
NSN 6610-00-445-1154
NSN 5910-00-203-5542
NSN 7035-01-143-0355
NSN 6145-00-323-0185
NSN 6110-01-073-6117
NSN 6240-01-188-7282