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 5895-01-539-6506
NSN 5935-01-098-8468
NSN 6150-01-552-3321
NSN 7035-01-271-1643
NSN 6320-01-056-1164
NSN 6220-00-703-5200
NSN 6220-00-191-2877
NSN 5965-01-482-4352
NSN 5905-00-438-4366
NSN 6110-01-565-8068
NSN 5855-00-688-9954
NSN 6145-01-648-0285