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 6320-01-322-8340
NSN 5925-00-402-4018
NSN 5990-01-054-3332
NSN 5975-01-522-2885
NSN 5950-00-116-8675
NSN 5945-00-236-5998
NSN 6620-00-986-0747
NSN 5960-00-916-8023
NSN 5990-01-264-6512
NSN 5999-01-438-4421
NSN 5910-01-490-2061
NSN 6110-01-239-8286