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 6240-01-209-5321
NSN 7035-00-215-3272
NSN 4140-00-069-0700
NSN 6610-00-104-6800
NSN 6105-00-930-8921
NSN 5905-01-252-8302
NSN 5996-00-963-1352
NSN 6620-00-006-1915
NSN 5915-00-303-4168
NSN 5965-01-328-9765
NSN 2925-01-123-5856
NSN 6110-01-025-1286