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 5960-01-536-9763
NSN 6240-01-518-8213
NSN 6220-01-578-5272
NSN 6135-01-433-2062
NSN 5930-01-484-9116
NSN 5910-01-477-3514
NSN 4140-01-393-5121
NSN 5999-00-419-0244
NSN 6685-00-389-7935
NSN 5920-01-535-4089
NSN 6645-00-467-6094
NSN 5855-01-467-3802