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 6645-00-283-6794
NSN 5905-01-297-8998
NSN 6105-00-954-6535
NSN 5996-01-627-7593
NSN 5990-01-555-6616
NSN 5975-01-594-5389
NSN 6130-00-447-7744
NSN 6610-00-465-7461
NSN 5985-01-035-6272
NSN 5965-00-549-0220
NSN 5945-01-633-9134
NSN 2925-00-254-9776