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 5950-01-389-9418
NSN 5920-01-576-8240
NSN 6150-01-644-8830
NSN 6645-01-225-4768
NSN 5930-01-292-8297
NSN 5975-00-553-7151
NSN 5945-01-101-6089
NSN 5945-01-022-7784
NSN 5930-01-252-3983
NSN 7035-01-223-9584
NSN 6135-00-078-9931
NSN 6150-01-023-7710