
Hex socket head screws defined in the DIN 912 standard published by the German Standardization Institute (DIN) are cylindrical head screws with internal hex drive suitable for hex / hex key. The internal drive is ideal where externally screwed screws are impractical, such as applications where space is limited. These screws are mainly produced in steel and stainless steel, with diameters ranging from M1.6 to M48, with coarse and fine threads up to 320 mm.

The requirements in the DIN 912 standard are under the following headings:
Similarly, the ISO 4762 standard, published by the International Organization for Standardization (ISO), describes the specifications for hexagonal socket head screws with thick pitch, from M1,6 to M64, including product class A (ISO 4762 Hexagonal socket head screws). Approximate screw masses are given in the standard appendix (Appendix A). In special cases, if specifications other than those listed in this standard are required, existing international standards such as ISO 261, ISO 888, ISO 898-1, ISO 965-2, ISO 3506-1, ISO 8839, and ISO 4759-1 should be followed.
Essentially, the DIN 912 standard is a modified version of the ISO 4762 standard.
Hex-hole bolts on a cylindrical head secured with a hex key are also called cap screws or hex screws, but the most common names are hex head screw and cap bolt. Such screws are generally produced with black oxide coating.
Our organization, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, with its trained and expert staff and advanced technological equipment, for hexagon socket head screws within the scope of DIN 912 standard, for hexagon socket head screws within the scope of ISO 4762 standard. and within the scope of the BS 4168 standard, it also provides testing services for socket head screws.
