S-90379A105 M8 x 30 mm JIS B 1180 JIS Medium-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc yellow-chromate plating, extending service life in harsh industrial environments
• High tensile strength of 110,000 psi ensures reliable performance in demanding applications without failure
• Class 8.8 strength grade provides excellent load-bearing capacity for heavy-duty fastening requirements
• Fully threaded coarse pitch design enables faster installation and superior grip in various materials
• Precision external hex drive allows for secure tool engagement and efficient torque application
• Rockwell C21 hardness maintains structural integrity under vibration and stress conditions
• JIS B 1180 compliance guarantees consistent quality and interchangeability in metric fastener systems

Professional Applications & Engineering Value

These M8 hex head screws deliver exceptional engineering value through their Class 8.8 steel construction and zinc yellow-chromate finish, specifically designed to address common industrial fastening challenges. The fully threaded metric coarse pitch (1.25mm) configuration provides superior holding power in metal assemblies, machinery, and structural applications where vibration resistance is critical. The external hex drive ensures secure tool engagement during high-torque installation, preventing stripping and maintaining fastener integrity. With 110,000 psi tensile strength and Rockwell C21 hardness, these screws withstand extreme mechanical stresses while the corrosion-resistant plating protects against environmental degradation in manufacturing, automotive, and construction settings where reliable industrial fasteners are essential for operational safety and longevity.

Specification Summary & Compliance

This M8 x 1.25mm hex head screw features precision Class 6g thread fit tolerance and metric coarse threading according to standard specifications. Manufactured to meet JIS B 1180 standards, the fastener ensures dimensional accuracy and performance consistency. The 30mm length and fully threaded design provide uniform stress distribution, while the zinc yellow-chromate plating offers environmental protection compliant with industrial corrosion resistance requirements.