12.9 Black Oxide Coated Steel Dome Head Bolts

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 due to the nature of the surface finish on Unbrako products, some surface corrosion may be evident. This does not affect the performance of the product. Property class of 12.9, similar to ISO 7380.

High Tensile Socket Head Flange Button Screws in a Black Oxide Finish. A popular and attractive socket screw with an integrated flange offering a wider head for bolting softer materials, and used where a lower profile 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 due to the nature of the surface finish on Unbrako products, some surface corrosion may be evident. This does not affect the performance of the product. Property class of 12.9, similar to ISO 7380 part 2.

Holo-Krome branded socket button screws, in alloy steel with a strength grade of 12.9, and finished with black oxide. Manufactured in the USA, Holo-Krome are high quality screws, similar to Unbrako, with precision 3A threads for greater clamping force. Socket button head screws have a lower wider head than the socket head cap screws and tend to be used where the head of the bolt will not cause snagging. The hex drive is generally smaller than other hex driven ranges and thus the ultimate tightening torque is reduced (see data sheet). Manufactured to ISO 7380 and are fully threaded.