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 6220-01-395-5205
NSN 5996-01-191-8758
NSN 6135-01-159-3032
NSN 5950-01-602-3025
NSN 6645-01-342-1917
NSN 6320-01-259-2604
NSN 5895-00-931-7709
NSN 6320-01-284-4508
NSN 5975-00-487-5381
NSN 6105-00-935-8736
NSN 5895-01-555-8360
NSN 6685-01-602-9962