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 6650-01-148-5307
NSN 5915-01-593-8937
NSN 6145-01-334-9763
NSN 5935-01-240-6561
NSN 5996-01-577-9696
NSN 6220-00-927-6272
NSN 5999-00-624-9397
NSN 5925-00-464-0668
NSN 7035-00-507-5380
NSN 6320-01-119-3935
NSN 6620-01-186-4374
NSN 6320-00-036-3688