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 6320-01-029-4220
NSN 6105-01-459-2589
NSN 6145-00-865-4833
NSN 6130-01-104-1308
NSN 5855-00-252-5743
NSN 5985-01-019-4911
NSN 6130-01-038-0806
NSN 6610-01-521-8692
NSN 5925-01-275-7266
NSN 6110-01-167-8906
NSN 5996-01-400-3558
NSN 5990-01-582-5238