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 5935-01-116-0351
NSN 5999-00-402-0812
NSN 5915-01-307-1673
NSN 6620-00-730-8699
NSN 6150-01-345-5626
NSN 6150-00-288-6245
NSN 5855-01-441-3189
NSN 5985-01-643-3872
NSN 6610-00-410-6072
NSN 6320-01-170-4068
NSN 6610-00-058-9527
NSN 5950-01-165-4050