S-91280A290 M8 x 120 mm ISO 4014, DIN 931 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Class 8.8 strength grade combined with Rockwell C21 hardness provides superior durability and resistance to deformation, extending service life in industrial environments.
• Partially threaded design with a minimum 22mm thread length offers optimal grip and clamping force, preventing loosening in vibration-prone assemblies.
• Coarse M8 x 1.25mm thread enables quick and easy installation while maintaining strong holding power, saving valuable assembly time.
• External hex head design allows for high-torque application with standard tools, ensuring secure fastening in confined spaces.
• Full compliance with ISO 4014 DIN 931 standards guarantees dimensional accuracy and interchangeability, eliminating compatibility issues in global projects.
• RoHS 3 and REACH compliant construction ensures environmental responsibility and workplace safety, meeting international regulatory requirements.

Professional Applications & Engineering Value

This M8 hex head screw delivers exceptional engineering value through its Class 8.8 steel construction and precision metric coarse threading. The combination of 110,000 psi tensile strength and Rockwell C21 hardness addresses critical industrial challenges including vibration resistance, load distribution, and long-term reliability in heavy machinery, structural frameworks, and equipment manufacturing. The partially threaded design with controlled thread engagement prevents stress concentration points while the external hex drive facilitates efficient installation in space-constrained applications. Manufactured to ISO 4014 DIN 931 specifications with Class 6g thread fit, these black steel fasteners provide consistent performance in automotive, construction, and industrial assembly where dimensional precision and corrosion resistance are paramount.

Specification Summary & Compliance

This metric hex head screw features precise M8 x 1.25mm coarse threading with Class 6g thread fit tolerance ensuring proper engagement and interchangeability. The 120mm length with 22mm minimum thread length provides optimal fastening capability. Manufactured according to ISO 4014 DIN 931 standards for dimensional accuracy and mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and regulatory adherence for industrial applications worldwide.