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 5855-01-249-8456
NSN 5945-01-423-3889
NSN 5905-01-452-3310
NSN 5910-01-084-9163
NSN 6685-01-152-1212
NSN 2925-01-043-9786
NSN 6135-00-110-1981
NSN 6685-00-469-2550
NSN 5915-01-506-1886
NSN 6645-01-483-1518
NSN 5996-01-612-3403
NSN 6150-01-648-7364