S-91294A597 M20 x 55 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments.
• High tensile strength of 120,000 psi and Class 10.9 grade ensures reliable performance under heavy loads.
• Precise Class 6g thread fit guarantees smooth installation and secure fastening in metric applications.
• Fully threaded design provides maximum grip and uniform stress distribution along the entire length.
• Standard 90° countersink angle and flat head allows for flush mounting, reducing snag hazards.
• 12mm hex drive enables high-torque installation with common tools, speeding up assembly.
• Compliance with DIN 7991/ISO 10642, RoHS 3, and REACH ensures quality, safety, and environmental standards are met.

Professional Applications & Engineering Value

This M20 flat head screw is engineered from black-oxide alloy steel to combat corrosion in demanding settings like machinery, structural frames, and automotive assemblies. The Class 10.9 strength grade and Rockwell C32 hardness provide durability against vibration and dynamic loads, minimizing failure risks. With a coarse 2.5mm pitch and fully threaded right-hand thread, it offers quick engagement and robust clamping force. The flat head with hex drive ensures easy, flush installation, making it a reliable choice for heavy-duty fastening where precision and longevity are critical.

Specification Summary & Compliance

This screw features M20x2.5 metric threads with a Class 6g tolerance for precise fit, a length of 55 mm, and head diameter of 36 mm. It conforms to DIN 7991 / ISO 10642 standards for dimensional accuracy and manufacturing consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use.