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 5895-01-445-6690
NSN 6320-00-480-7922
NSN 6145-00-847-6772
NSN 6620-00-527-6523
NSN 5950-00-944-8657
NSN 6645-00-079-4087
NSN 5965-00-772-0545
NSN 5945-00-340-6868
NSN 6135-01-026-9960
NSN 5999-00-152-7998
NSN 6135-01-413-4747
NSN 5990-01-425-2175