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 6685-00-258-9191
NSN 5975-01-634-0678
NSN 5996-01-132-7833
NSN 6620-00-555-3992
NSN 5915-01-565-3091
NSN 5910-00-333-1213
NSN 6150-01-107-3455
NSN 6240-01-333-9430
NSN 5910-01-403-2812
NSN 6110-01-097-6805
NSN 6645-00-155-2398
NSN 5835-00-447-1924