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 6685-01-216-7164
NSN 5985-01-097-9556
NSN 5920-01-097-9927
NSN 5895-01-582-7511
NSN 5905-01-422-5509
NSN 5855-01-461-7726
NSN 6645-01-144-8627
NSN 4140-01-241-5759
NSN 6620-00-513-0738
NSN 5945-01-174-8526
NSN 2925-01-426-3410
NSN 5910-01-360-0411