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 6145-01-456-9550
NSN 5985-00-636-8689
NSN 5950-00-247-8777
NSN 5975-01-025-1613
NSN 6135-01-364-0667
NSN 6320-01-569-2672
NSN 5999-00-503-3553
NSN 6135-01-444-6824
NSN 5930-01-499-6741
NSN 5990-01-264-9759
NSN 6105-01-185-6462
NSN 6110-01-515-0420