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 6620-01-351-6870
NSN 6645-01-058-8877
NSN 5930-01-026-3544
NSN 5920-00-687-1896
NSN 5960-00-320-3093
NSN 5950-01-607-0981
NSN 5950-00-803-2295
NSN 6620-01-240-2401
NSN 5985-01-460-5521
NSN 5910-01-090-0453
NSN 5975-00-493-3614
NSN 6110-01-082-7806