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 6105-00-072-8785
NSN 6650-01-472-6753
NSN 5990-00-672-1376
NSN 5996-01-271-6707
NSN 5985-01-606-5673
NSN 6610-01-304-3226
NSN 6110-01-365-1669
NSN 4140-01-080-8268
NSN 5930-00-243-2468
NSN 6320-01-056-1164
NSN 6110-01-245-3059
NSN 6135-01-086-0809