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 6220-01-369-1646
NSN 6130-01-653-8440
NSN 5925-00-013-1258
NSN 5945-00-553-9963
NSN 5950-01-502-7019
NSN 6105-00-006-7912
NSN 5935-00-900-9405
NSN 6135-01-101-5039
NSN 5985-00-156-1635
NSN 6220-00-399-6318
NSN 6105-01-296-6179
NSN 5999-00-583-2661