S-91290A109 M3 x 4 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the Black-Oxide finish on alloy steel, extending service life in harsh industrial environments.
• Precise hex drive (2.5mm) allows for secure tool engagement and efficient installation, minimizing slippage and damage.
• Class 12.9 strength rating and Rockwell C37 hardness provide outstanding durability and wear resistance for long-term use.
• Coarse M3 x 0.5mm thread with Class 5g6g fit ensures easy assembly and reliable holding power in various materials.
• Full compliance with DIN 912/ISO 4762 guarantees dimensional accuracy and interchangeability in metric assemblies.
• RoHS 3 and REACH compliance meets environmental regulations, making them suitable for global industrial supply chains.

Professional Applications & Engineering Value

These Class 12.9 socket head cap screws are engineered to address critical challenges in industrial and mechanical assemblies. The Black-Oxide alloy steel construction offers enhanced corrosion resistance, which is vital for applications exposed to moisture, chemicals, or outdoor conditions. With a high tensile strength of 170,000 psi and Rockwell C37 hardness, they withstand heavy loads and repetitive stress, reducing maintenance needs in machinery, automotive, and aerospace components. The M3 coarse thread and Class 5g6g thread fit ensure quick, secure fastening in metals and plastics, while the 2.5mm hex drive simplifies installation in confined spaces. Ideal for precision equipment, these metric socket screws deliver consistent performance under demanding conditions, backed by international standards for reliability.

Specification Summary & Compliance

This product features precise dimensions, including a 4mm length, M3 thread size with 0.5mm pitch, and Class 5g6g thread fit for standard metric applications. It conforms to DIN 912 and ISO 4762 specifications, ensuring accurate socket head profile and dimensional tolerances. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable use in industrial environments.