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 6135-01-543-9686
NSN 5985-01-607-7109
NSN 5996-01-182-1125
NSN 5975-01-162-4075
NSN 6685-00-555-0875
NSN 7035-01-536-3458
NSN 5960-00-525-1898
NSN 5935-01-591-2845
NSN 6610-00-762-8290
NSN 5920-01-578-7050
NSN 5985-00-542-0597
NSN 6130-01-430-4537