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 6145-00-825-2657
NSN 5996-00-186-8709
NSN 5965-00-953-0072
NSN 5950-00-154-0329
NSN 5996-01-089-5339
NSN 5920-01-497-9042
NSN 2925-00-980-5749
NSN 5915-01-243-6682
NSN 5835-01-254-8584
NSN 6135-00-009-4100
NSN 5945-01-338-9311
NSN 5835-01-584-8538