S-91290A038 M18 x 55 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and reliability with Class 12.9 alloy steel construction, providing a tensile strength of 170,000 psi for demanding industrial applications.
• Superior corrosion resistance thanks to the black-oxide surface treatment, extending service life in harsh environments.
• High torque capability and secure installation via the 14 mm hex drive and standard socket head profile, minimizing stripping and ensuring precise fastening.
• Consistent and reliable thread engagement with M18 x 2.5 mm coarse right-hand threads and Class 5g6g fit, ensuring easy assembly and vibration resistance.
• Full thread coverage for maximum grip across the entire 55 mm length, offering versatile fastening in a wide range of material thicknesses.
• Guaranteed dimensional accuracy and interchangeability through compliance with DIN 912 and ISO 4762 standards, reducing assembly errors.
• Safe for regulated industries with RoHS 3 and REACH compliance, meeting strict environmental and health standards.

Professional Applications & Engineering Value

This M18 socket head cap screw is engineered to address critical challenges in heavy machinery, automotive, and construction sectors where joint integrity is non-negotiable. The Class 12.9 alloy steel core, hardened to Rockwell C37, resists deformation under extreme loads, while the black-oxide finish provides a durable barrier against rust and wear in humid or corrosive settings. Its fully threaded design and coarse metric thread (2.5 mm pitch) enable rapid installation and robust clamping force, minimizing the risk of loosening in high-vibration environments. By adhering to DIN 912/ISO 4762 specifications, this fastener ensures precise fit and performance, making it ideal for assembly lines, structural frames, and equipment requiring repeated disassembly without compromise.

Specification Summary & Compliance

This product meets DIN 912 (identical to ISO 4762) for dimensional accuracy, including a Class 5g6g thread fit for consistent engagement. It is manufactured from alloy steel with a tensile strength of 170,000 psi and hardness of Rockwell C37. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring adherence to environmental and safety regulations.