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 6135-01-588-4160
NSN 6110-00-933-7683
NSN 6145-00-578-7522
NSN 5950-00-259-5807
NSN 6130-01-168-8507
NSN 5960-00-466-3523
NSN 6610-00-361-6954
NSN 5998-00-464-3022
NSN 5965-01-142-8044
NSN 5930-01-349-7543
NSN 5950-01-382-5662
NSN 7035-00-803-3056