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 6240-01-346-3164
NSN 5950-00-519-9515
NSN 5920-00-800-8998
NSN 6610-00-899-7445
NSN 5930-01-451-6795
NSN 6650-01-124-4314
NSN 5920-00-097-1108
NSN 5999-01-442-7804
NSN 5910-01-577-4546
NSN 6645-01-062-0905
NSN 5975-01-088-6925
NSN 5920-01-653-9512