S-91280A050 M5 x 12 mm ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With 110,000 psi tensile strength, these screws provide reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior Durability and Hardness – Rockwell C21 hardness ensures excellent wear resistance and long service life under demanding conditions.
• Optimized Coarse Thread Design – The M5 x 0.8mm coarse thread offers faster installation and enhanced grip in a variety of materials, improving assembly efficiency.
• Corrosion-Resistant Black Oxide Finish – The black surface treatment provides added protection against rust, extending the fastener's usability in industrial environments.
• Full Thread Engagement – Fully threaded design ensures maximum holding power and uniform load distribution along the entire length.
• High-Strength Class 8.8 Steel Construction – Made from robust steel, these screws deliver consistent performance and reliability in mechanical assemblies.
• Precision External Hex Drive – The hex head allows for easy tightening with standard tools, reducing installation time and improving accessibility.

Professional Applications & Engineering Value

Engineered for demanding industrial and mechanical applications, these M5 hex head screws address common challenges such as vibration loosening and material fatigue. The Class 8.8 steel construction, combined with a coarse metric thread (M5 x 0.8mm), ensures secure fastening in metals, plastics, and assembled components, providing superior resistance to dynamic loads. The black oxide finish enhances corrosion resistance, making these screws ideal for use in machinery, automotive assemblies, and outdoor equipment where exposure to moisture and harsh conditions is a concern. With full threading and a right-hand thread direction, they offer quick installation and reliable performance, reducing maintenance needs and downtime in production environments.

Specification Summary & Compliance

This screw meets ISO 4017 DIN 933 specifications, ensuring precise dimensional accuracy and Class 6g thread fit for consistent performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity. The fastener is manufactured to high standards, with a length of 12 mm, external hex drive, and right-hand threading, providing reliable fastening solutions for professional and industrial use.