S-91239A420 M8 x 18 mm ISO 7380 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments
• High tensile strength of 140,000 psi ensures reliable performance under heavy loads
• Class 10.9 strength grade provides superior durability for critical applications
• Rockwell C32 hardness maintains structural integrity and resists wear
• 5mm hex drive design allows for easy installation with standard tools
• Fully threaded M8 coarse pitch delivers maximum grip and fast assembly
• Rounded button head profile reduces snagging and provides a finished appearance

Professional Applications & Engineering Value

These M8 x 1.25mm Class 10.9 black-oxide alloy steel rounded head screws are engineered to solve critical fastening challenges in demanding industrial settings. The black-oxide surface treatment significantly enhances corrosion resistance, extending service life in environments exposed to moisture and chemicals. With a 140,000 psi tensile strength and Rockwell C32 hardness, they prevent stripping and deformation under high stress. The fully threaded metric coarse pitch design ensures rapid installation and superior holding power in machinery, automotive assemblies, and structural frameworks. The 5mm hex drive combined with the rounded button head facilitates quick tool engagement while minimizing protrusion risks, making them ideal for applications where space constraints and safety are priorities.

Specification Summary & Compliance

This fastener features M8 x 1.25mm coarse threads with Class 6g thread fit for precise engagement and 18mm length. Manufactured to ISO 7380 standards, it ensures dimensional accuracy and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and regulatory adherence for global industrial use.