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 5950-01-381-0490
NSN 5985-01-213-3549
NSN 6220-01-612-6006
NSN 7035-01-226-8894
NSN 5930-00-113-9742
NSN 5910-01-089-9785
NSN 6240-01-608-4990
NSN 5998-01-278-1955
NSN 5950-00-763-2342
NSN 5985-01-468-0709
NSN 5905-01-376-8457
NSN 6240-01-646-0860