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 6620-01-448-1423
NSN 5965-01-141-6485
NSN 5835-00-050-4330
NSN 5855-00-292-5086
NSN 6620-01-259-2411
NSN 5998-00-411-1728
NSN 6135-00-726-4142
NSN 5910-01-538-5158
NSN 6685-01-168-8893
NSN 5999-00-948-5498
NSN 5945-00-529-0409
NSN 6645-00-573-0572