Unbrako Socket Head Button Screws ISO 7380 M4mm in Black oxide high tensile steel class 12+
Socket Head Button Screws in a Black Oxide Finish. A popular socket head screw, typically used where a lower profile domed finish is required. UNBRAKO® branded and manufactured to be stronger than the other size for size high tensile versions. Includes a precision hex socket for maximum key engagement. Recommended for moderate applications such as machine guards, hinges and covers. Please note that the black oxide finish offers only a basic level of corrosion resistance. Property class of 12.9, similar to ISO 7380.