S-91760A438 M8 x 40 mm DIN 912, ISO 4762 Alloy Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with permanent nylon patch thread locker that maintains integrity across extreme temperature fluctuations from -70° to 250°F
• Exceptional corrosion protection through black-oxide surface treatment on alloy steel, extending service life in demanding industrial environments
• High-strength performance with 170,000 psi tensile strength and Rockwell C37 hardness for reliable load-bearing capability
• Precision thread engagement with Class 5g6g tolerance and M8x1.25mm coarse thread profile ensuring consistent fastening and reduced assembly time
• Secure hex drive compatibility featuring standard 6mm socket head design for high-torque application without cam-out risks
• Industry-standard compliance meeting DIN 912/ISO 4762 specifications for guaranteed dimensional accuracy and interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance, ensuring safe use across regulated industries

Professional Applications & Engineering Value

Engineered for critical industrial fastening applications, these metric socket head cap screws deliver exceptional performance in machinery assembly, automotive systems, and precision equipment. The black-oxide alloy steel construction provides superior corrosion resistance compared to standard finishes, while the permanent nylon patch thread locker eliminates the need for secondary locking components in high-vibration environments. With Class 5g6g thread fit and coarse thread pitch, these M8 screws ensure rapid installation and reliable clamping force in both soft and hard materials. The partially threaded design allows precise positioning while the 170,000 psi tensile strength guarantees structural integrity under dynamic loads, making them ideal for permanent fastening solutions where disassembly isn't anticipated.

Specification Summary & Compliance

This socket head cap screw features precision M8x1.25mm coarse threads with Class 5g6g tolerance per ISO metric standards, ensuring consistent fit and performance. Manufacturing complies with DIN 912/ISO 4762 specifications for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, confirming suitability for regulated industries and international markets.