S-90379A103 M8 x 20 mm JIS B 1180 JIS Medium-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 psi ensures reliable performance in demanding industrial applications
• Superior corrosion resistance provided by zinc yellow-chromate plating extends service life in harsh environments
• Precision Class 6g thread fit guarantees consistent engagement and secure fastening in metric assemblies
• Rockwell C21 hardness rating delivers optimal durability and resistance to wear under repeated use
• Coarse 1.25mm pitch threading enables quick installation and superior holding power in various materials
• Full threading design maximizes grip length and distributes load evenly across the entire fastener
• JIS B 1180 standard compliance ensures consistent quality and interchangeability in international projects

Professional Applications & Engineering Value

These Class 8.8 steel hex head screws are engineered to solve critical fastening challenges in industrial machinery, automotive assemblies, and structural applications. The M8 coarse thread with 1.25mm pitch provides excellent vibration resistance and prevents loosening in dynamic environments. The zinc yellow-chromate plating offers superior protection against corrosion, making these metric screws ideal for outdoor equipment and manufacturing facilities exposed to moisture. With their external hex drive design and fully threaded construction, they deliver maximum clamping force and simplified installation for maintenance teams working with industrial hex screws in time-sensitive production environments.

Specification Summary & Compliance

This metric fastener features precise Class 6g thread tolerance with M8 x 1.25mm coarse thread specification and 20mm length. Manufactured to meet JIS B 1180 standards with Class 8.8 strength grade certification. The zinc yellow-chromate plating provides RoHS and REACH compliance for environmental safety requirements.