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 6220-01-137-2848
NSN 2925-00-163-9016
NSN 5996-00-218-1123
NSN 5855-00-631-4565
NSN 5935-01-320-7724
NSN 6220-01-326-0716
NSN 5985-00-617-9043
NSN 5985-01-112-7349
NSN 5945-01-004-4350
NSN 5990-01-148-5326
NSN 6150-00-323-8226
NSN 5895-01-054-9062