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 6320-00-731-6134
NSN 5965-01-625-7255
NSN 5910-01-384-3808
NSN 5985-01-551-3618
NSN 5950-01-631-8270
NSN 5950-01-218-4877
NSN 5950-01-310-2757
NSN 5990-00-855-9451
NSN 5855-01-556-2665
NSN 2925-01-442-0878
NSN 6110-00-195-7769
NSN 6620-00-233-6839