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 5960-00-068-0625
NSN 6620-01-237-5603
NSN 6320-01-021-6633
NSN 5990-00-565-9027
NSN 6240-00-435-0433
NSN 6220-00-949-1931
NSN 6645-01-350-3138
NSN 5855-01-627-0837
NSN 5910-01-633-9963
NSN 6240-01-068-3491
NSN 5855-01-426-5589
NSN 6685-01-226-7593