Used to ground hydrogen tank vent stacks
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 6320-00-823-2015
NSN 5975-00-529-3835
NSN 5996-01-268-1625
NSN 6320-01-029-4220
NSN 5996-01-010-5781
NSN 5930-01-508-4255
NSN 5996-01-274-9453
NSN 5996-01-204-0675
NSN 6650-01-579-5608
NSN 6105-01-097-6754
NSN 6220-01-432-6278
NSN 5930-00-070-4337