S-91290A079 M3 x 45 mm DIN 912 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength with a Class 12.9 rating and 170,000 psi capability, ensuring reliable performance in high-stress industrial environments.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in demanding conditions.
• Precise torque application enabled by the 2.5 mm hex drive and standard socket head, reducing the risk of stripping and improving assembly efficiency.
• Optimized thread engagement with M3 x 0.5 mm coarse threads and Class 5g6g fit, providing secure fastening and vibration resistance.
• Versatile partial threading over 18 mm, allowing for adjustable clamping force and ease of use in varied assembly setups.
• High hardness durability at Rockwell C37, minimizing wear and deformation under repeated loads.
• Compliance with international standards including DIN 912, ensuring interchangeability and quality consistency in global applications.

Professional Applications & Engineering Value

Engineered for high-stress applications, this M3 socket head cap screw addresses common industrial challenges such as joint failure and corrosion-induced degradation. The black-oxide alloy steel construction provides a protective layer that combats environmental exposure, while the Class 12.9 strength and Rockwell C37 hardness ensure it withstands extreme mechanical loads without compromising integrity. Its metric thread design with a coarse pitch facilitates quick installation and secure holding in materials like metals and composites, making it ideal for machinery, automotive assemblies, and precision equipment where reliable fastening solutions are critical. The partially threaded rod allows for flexibility in clamping depth, enhancing versatility across engineering projects.

Specification Summary & Compliance

This screw adheres to precise dimensional tolerances with a Thread Fit Class 5g6g and complies with the DIN 912 standard for socket head cap screws. It meets regulatory requirements including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental safety and material sustainability. The specifications cover a length of 45 mm, thread size M3 x 0.5 mm, and a minimum thread length of 18 mm, guaranteeing consistency and reliability in industrial use.