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 6685-01-459-9544
NSN 6645-01-229-8873
NSN 5915-01-134-3550
NSN 5985-01-380-3906
NSN 5975-01-558-4063
NSN 5996-01-254-3892
NSN 5855-00-869-3635
NSN 5990-01-483-7313
NSN 5965-01-332-9825
NSN 6240-01-554-9952
NSN 5965-01-423-8335
NSN 2925-01-359-9818