S-91290A140 M4 x 8 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and reliability with Class 12.9 rating and 170,000 psi tensile strength for heavy-duty applications
• Superior corrosion resistance thanks to the black-oxide finish on alloy steel, extending service life in harsh environments
• Precise and secure fastening with Class 5g6g thread fit and coarse 0.7mm pitch for quick assembly and vibration resistance
• Easy installation and removal using a standard 3mm hex drive, providing excellent torque transmission and reduced tool slippage
• Full thread engagement along the entire 8mm length for maximum holding power and uniform stress distribution
• Global compliance and interchangeability meeting DIN 912/ISO 4762 standards, ensuring consistent quality and fit
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

This M4 socket head cap screw is engineered for demanding industrial environments where failure is not an option. The black-oxide alloy steel construction provides excellent corrosion resistance while maintaining the Class 12.9 strength rating critical for high-stress applications. The fully threaded design with coarse 0.7mm pitch ensures rapid assembly and superior vibration resistance in machinery, automotive components, and precision equipment. The 3mm hex drive socket head allows for high torque application in confined spaces, reducing installation time while preventing cam-out. These metric socket screws deliver reliable performance in critical joints where consistent clamping force and durability are paramount, making them ideal for assembly lines, manufacturing equipment, and structural frameworks requiring high-strength fasteners.

Specification Summary & Compliance

This fastener features precision Class 5g6g thread fit according to ISO metric standards, ensuring consistent engagement and reliable performance. Manufactured to DIN 912/ISO 4762 specifications with complete dimensional compliance. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for use in regulated industries and international markets. With Rockwell C37 hardness and verified 170,000 psi tensile strength, this screw maintains structural integrity under extreme mechanical stresses.