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 5835-01-509-8992
NSN 5895-00-778-1713
NSN 5950-01-423-5542
NSN 5990-01-109-5295
NSN 5965-00-144-2543
NSN 6645-00-255-8182
NSN 5855-01-007-9541
NSN 5835-00-966-5481
NSN 6620-01-350-0323
NSN 6610-01-431-6867
NSN 5935-01-281-7686
NSN 5950-01-218-2986