S-91290A891 M30 x 180 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 under extreme loads, reducing the risk of fastener failure in critical applications.
• Superior corrosion resistance from the black-oxide coating extends service life and maintains integrity in harsh industrial environments.
• High-strength Class 12.9 rating provides excellent fatigue resistance and durability for heavy-duty machinery and structural assemblies.
• Precise hex socket drive with 22 mm size allows for secure tool engagement and high torque application, minimizing stripping and improving installation efficiency.
• Optimized thread design with Class 5g6g fit and coarse 3.5 mm pitch ensures easy alignment, faster assembly, and vibration resistance in dynamic systems.
• Partially threaded shank (72 mm thread length on 180 mm total) offers concentrated clamping force where needed, enhancing joint stability and reducing stress concentrations.
• Global compliance with DIN 912/ISO 4762 standards guarantees interchangeability and reliability, while RoHS 3 and REACH adherence supports safe, sustainable usage.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this M30 socket head cap screw delivers robust performance in heavy machinery, automotive systems, and construction equipment. The black-oxide alloy steel construction combats corrosion and wear, prolonging component life in exposed or high-moisture environments. With a Class 12.9 strength rating and 170,000 psi tensile strength, it withstands intense vibrational and dynamic loads, preventing loosening in critical assemblies. The coarse metric thread (3.5 mm pitch) and hex drive design enable quick, secure fastening, reducing installation time and maintenance costs. Ideal for partially threaded applications, it ensures precise clamping without unnecessary thread engagement, enhancing structural integrity in frames, presses, and motor mounts.

Specification Summary & Compliance

This screw adheres to DIN 912 / ISO 4762 specifications, ensuring dimensional accuracy with a Class 5g6g thread fit for consistent performance. It features a metric coarse thread (M30 x 3.5 mm), 72 mm minimum thread length, and 180 mm total length, all manufactured to high precision. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming environmental safety and regulatory alignment for global industrial use.