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 5975-01-091-5505
NSN 6645-01-219-4492
NSN 6320-00-643-0958
NSN 7035-01-465-0391
NSN 5990-01-459-9533
NSN 2925-00-938-3797
NSN 5960-01-273-7044
NSN 6620-01-451-8989
NSN 5975-01-534-8654
NSN 5950-01-424-2019
NSN 6685-00-225-8571
NSN 4140-01-510-3984