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 6150-01-085-4590
NSN 5855-01-197-2774
NSN 5998-01-606-8120
NSN 5895-01-246-2475
NSN 5960-00-337-2792
NSN 5925-00-421-8880
NSN 6220-01-087-5115
NSN 7035-01-131-1168
NSN 5985-01-227-1526
NSN 5990-00-837-4312
NSN 5965-01-420-2629
NSN 5945-01-008-5682