S-90180A621 M8 x 25 mm ISO 4017, DIN 933 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capability with 150,000 psi tensile strength and Class 10.9 rating for reliable performance in high-stress assemblies.
• Enhanced corrosion resistance through blue-dyed zinc plating, extending service life in harsh industrial environments.
• Precision thread engagement with Class 6g fit and M8x1.25mm coarse spacing ensures quick installation and vibration resistance.
• Maximum thread utilization via fully threaded design, providing consistent clamping force along the entire 25mm length.
• Optimized drive efficiency with external hex head design (13mm width) enabling high-torque application with standard tools.
• Certified material integrity with Rockwell C32 hardness maintaining dimensional stability under repeated loading cycles.
• Global compliance assurance meeting ISO 4017/DIN 933 manufacturing standards plus RoHS 3 and REACH environmental directives.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these M8 hex head screws deliver critical reliability in machinery assembly, structural frameworks, and heavy equipment manufacturing. The Class 10.9 steel construction provides exceptional resistance to dynamic loads and fatigue, while the blue-dyed zinc plating creates a protective barrier against oxidation in outdoor or humid environments. The coarse thread pitch (1.25mm) enables faster installation in soft materials and better debris clearance, reducing cross-threading risks. With full threading along the 25mm length, these metric screws maintain uniform stress distribution across joined components, preventing joint loosening in vibrating systems. Their external hex drive accommodates standard wrenches for secure tightening in confined spaces.

Specification Summary & Compliance

Manufactured to ISO 4017/DIN 933 specifications with Class 6g thread tolerance ensuring precise fitment. The metric coarse thread (M8x1.25mm) maintains consistent pitch accuracy across the 25mm fully threaded length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances. Class 10.9 strength certification verifies 150,000 psi minimum tensile strength and Rockwell C32 hardness, meeting international engineering standards for heavy-duty fastening applications.