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 5920-01-211-4365
NSN 6610-00-038-8148
NSN 5998-01-506-0520
NSN 6645-01-143-7838
NSN 7035-01-525-7673
NSN 5910-01-420-2660
NSN 5975-00-553-7151
NSN 7035-00-205-1932
NSN 5950-01-138-7296
NSN 5965-00-529-0602
NSN 6110-01-471-8413
NSN 4140-01-485-0083