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 5975-01-619-8588
NSN 6110-01-508-2418
NSN 5915-00-376-2121
NSN 5930-01-369-9394
NSN 6150-01-267-9546
NSN 6645-01-603-9331
NSN 6610-01-017-9063
NSN 6150-00-995-2511
NSN 6220-01-385-2999
NSN 5915-00-059-3584
NSN 5915-01-013-7252
NSN 5996-01-318-9337