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 5999-00-100-5761
NSN 5855-00-688-9954
NSN 5855-00-004-0904
NSN 6620-01-076-8706
NSN 5965-01-526-3190
NSN 6610-01-444-1463
NSN 6145-01-398-8811
NSN 6135-01-648-4875
NSN 6620-00-079-4615
NSN 5975-00-926-3073
NSN 5925-01-081-0436
NSN 5965-01-654-7451