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 5905-00-623-4801
NSN 5930-01-653-4653
NSN 5910-00-360-5167
NSN 5975-01-423-0695
NSN 5945-01-323-8672
NSN 6110-01-069-4895
NSN 5985-00-437-7891
NSN 6220-01-498-2800
NSN 2925-01-197-7864
NSN 5990-01-612-5323
NSN 6240-01-442-3501
NSN 5925-01-236-1409