S-91290A850 M20 x 50 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Class 12.9 rating and 170,000 psi tensile strength, ensuring reliable performance under high stress.
• Superior corrosion resistance from the black-oxide surface treatment, extending service life in harsh industrial environments.
• Precise fit and easy installation with a 17mm hex drive and standard socket head profile, reducing assembly time and tool wear.
• High durability and wear resistance due to Rockwell C37 hardness, maintaining integrity in repetitive or high-load scenarios.
• Wide compatibility and secure fastening with M20 coarse threads (2.5mm pitch) and Class 5g6g thread fit, minimizing loosening in vibrating machinery.
• Full-threaded design for uniform load distribution, providing consistent clamping force along the entire 50mm length.
• Compliance with international standards including DIN 912/ISO 4762, ensuring quality and interchangeability in global projects.

Professional Applications & Engineering Value

This Class 12.9 socket head cap screw is engineered from black-oxide alloy steel to address critical industrial challenges, such as vibration-induced loosening and corrosion in heavy machinery. Its M20 coarse thread with a 2.5mm pitch and Class 5g6g fit ensures quick assembly and reliable retention in high-stress environments like automotive manufacturing, construction equipment, and industrial automation. The fully threaded design distributes load evenly, reducing the risk of joint failure, while the 17mm hex drive allows for efficient torque application with standard tools. Ideal for applications requiring high tensile strength and durability, this fastener supports prolonged operational life and minimizes maintenance downtime, making it a cost-effective solution for engineers and procurement specialists.

Specification Summary & Compliance

This product adheres to precise dimensional tolerances, including Class 5g6g thread fit per ISO metric standards, and is manufactured in compliance with DIN 912/ISO 4762 specifications. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material sustainability. The screw features a right-hand thread direction, coarse thread spacing, and full threading for consistent performance across industrial applications.