High Quality: Made from premium 304 stainless steel, the hex coupling nut is anti-rust, anti-corrosion and durable which can provide long-term use. Specification: Pitch: 1mm, Hex Width: 10mm, Length: 30mm, Hex, Set of 6 Application: Specially designed to fasten two parts together to make them one piece, the hex nut fits bolts, nails, machine screws, threaded rod, etc. Suitable for indoor and outdoor use. Easy connection: it can be easily disassembled and assembled with only a hex wrench.