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 5910-01-338-7317
NSN 5990-01-118-8624
NSN 6610-00-919-7490
NSN 5915-00-834-6217
NSN 5895-01-175-7317
NSN 6620-01-105-5770
NSN 5975-01-406-5337
NSN 5945-01-222-0675
NSN 5905-01-438-8487
NSN 6220-01-265-8650
NSN 5920-01-384-3387
NSN 5915-01-202-0909