S-91290A889 M30 x 150 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 coating extends service life in harsh industrial environments, minimizing maintenance needs.
• High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity and drive engagement over repeated use.
• Precision thread fit (Class 5g6g) and coarse pitch design facilitate quick assembly and secure fastening, saving time in production lines.
• Partially threaded shank allows for controlled clamping force and prevents thread damage in blind holes, enhancing joint reliability.
• Standard hex drive (22mm) offers easy installation with common tools, improving workflow efficiency and reducing tooling complexity.
• Compliance with DIN 912/ISO 4762 guarantees dimensional accuracy and interchangeability, ensuring compatibility in global engineering projects.

Professional Applications & Engineering Value

This M30 socket head cap screw is engineered to address critical challenges in heavy machinery, automotive assembly, and structural frameworks where vibration and dynamic loads are prevalent. The Class 12.9 alloy steel construction delivers unmatched tensile strength and fatigue resistance, preventing loosening under extreme conditions. Its black-oxide surface treatment provides a durable barrier against moisture and chemicals, ideal for outdoor or corrosive settings. The coarse metric thread (M30x3.5mm) ensures rapid installation and robust holding power, while the partially threaded design concentrates stress appropriately to avoid strip-out. By integrating these features, it reduces downtime and enhances safety in industrial fastening applications requiring precision and durability.

Specification Summary & Compliance

This screw adheres to DIN 912 / ISO 4762 standards, ensuring precise dimensions including a Class 5g6g thread fit for consistent engagement. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free from hazardous substances. The manufacturing follows strict tolerances for metric coarse threads, head diameter (45mm), and length (150mm), providing reliability in regulated industries.