S-91304A158 M8 x 50 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 10.9 strength rating and 120,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance through blue-dyed zinc plating that provides both aesthetic appeal and enhanced environmental protection
• Precise flush installation with 90° countersink angle and flat head design that sits perfectly flush with material surfaces
• Easy installation and removal with 5mm hex drive that prevents cam-out and allows for high torque application
• Optimized thread engagement through Class 6g thread fit and coarse 1.25mm pitch that ensures secure fastening in various materials
• Durable alloy steel construction with Rockwell C32 hardness that maintains structural integrity under repeated use
• Regulatory compliance assurance meeting international standards for quality and environmental safety

Professional Applications & Engineering Value

These M8 flat head screws deliver exceptional engineering value in industrial settings where high tensile strength and reliable fastening are critical. The blue-dyed zinc-plated alloy steel construction provides superior corrosion resistance, extending service life in demanding environments. The partially threaded design with 18mm minimum thread length ensures optimal clamping force distribution, while the coarse thread pitch (1.25mm) facilitates quicker installation and reduces cross-threading risks. The hex drive configuration allows for high-torque applications without slippage, making these metric screws ideal for machinery assembly, structural frameworks, and equipment manufacturing where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

Manufactured to precise Class 6g thread fit tolerance standards with 18mm minimum thread length and 90° countersink angle. These fasteners comply with DIN 7991 / ISO 10642 specifications for dimensional accuracy and performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility and international market acceptance.