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 6240-00-964-8864
NSN 7035-01-364-0286
NSN 5915-01-349-4270
NSN 5910-00-924-7298
NSN 5950-01-581-5875
NSN 5998-00-925-2241
NSN 6145-00-433-0021
NSN 6320-00-284-1524
NSN 5925-00-216-8767
NSN 6685-00-193-0201
NSN 6650-00-307-3437
NSN 6620-01-067-0536