S-91290A173 M4 x 35 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and reliability with Class 12.9 rating and 170,000 PSI tensile strength, ensuring high load-bearing capacity and resistance to failure in demanding applications.
• Superior corrosion resistance provided by the black-oxide coating, extending service life and maintaining performance in harsh or humid industrial environments.
• Precise and secure installation enabled by the 3 mm hex socket drive, minimizing cam-out and allowing for high torque application without damaging the fastener.
• Optimal thread engagement and holding power due to the M4 x 0.7 mm coarse thread and Class 5g6g thread fit, facilitating easier assembly and reliable fastening in a variety of materials.
• Maximum versatility and grip from the fully threaded design, allowing the screw to be used along its entire 35 mm length for adjustable and secure connections.
• Guaranteed dimensional accuracy and interchangeability through compliance with DIN 912 / ISO 4762 standards, ensuring a perfect fit and consistent performance in metric assemblies.
• Safe for regulated industries as it is RoHS 3 and REACH compliant, meeting strict environmental and safety standards for use in various global markets.

Professional Applications & Engineering Value

This M4 socket head cap screw is engineered to solve critical challenges in machinery, automation, and heavy-duty equipment assembly. The Class 12.9 alloy steel construction, with a hardness of Rockwell C37, provides the necessary durability to withstand high vibrational loads and dynamic stresses without shearing or loosening. The black-oxide surface treatment offers a robust layer of protection against oxidation and mild corrosion, which is vital for components operating in non-stainless environments or with exposure to coolants and oils. The hex socket drive and coarse metric thread ensure that installers can achieve high clamp loads efficiently, even in confined spaces, reducing assembly time and improving joint integrity. This makes it an indispensable industrial fastener for securing critical components in automotive subassemblies, industrial robots, and precision tooling where failure is not an option.

Specification Summary & Compliance

This screw features an M4 x 0.7 mm coarse metric thread with a Class 5g6g thread fit for standard tolerance and reliable engagement. It is manufactured to the dimensional and mechanical specifications of DIN 912 and ISO 4762. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances and safe for use in various industrial and consumer applications.