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 5950-01-467-7538
NSN 7035-01-474-9537
NSN 5975-01-056-4727
NSN 6150-01-567-0952
NSN 5905-01-452-4717
NSN 6110-00-056-8133
NSN 7035-00-421-8710
NSN 4140-01-498-4330
NSN 6645-00-171-9251
NSN 6135-00-078-9931
NSN 5920-00-422-0757
NSN 6320-00-908-6841