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 7035-01-477-2818
NSN 6645-01-349-6632
NSN 6130-00-778-9793
NSN 5835-01-286-6499
NSN 5965-01-492-5695
NSN 5835-01-571-4083
NSN 6610-00-377-7956
NSN 4140-01-174-0646
NSN 5998-01-589-5439
NSN 6220-01-239-8074
NSN 6685-00-383-6712
NSN 6145-00-705-6686