S-91280A524 M8 x 12 mm ISO 4017, DIN 933, SAE J1199, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in harsh industrial environments
• High tensile strength of 110,000 psi ensures reliable performance under heavy loads and vibration
• Class 8.8 strength grade provides excellent durability for demanding mechanical applications
• Fully threaded design offers maximum grip and uniform stress distribution along the entire length
• External hex drive enables easy installation and removal with standard tools
• Precision Class 6h thread fit guarantees smooth assembly and secure fastening
• Compliance with multiple international standards (ISO 4017, DIN 933, SAE J1199) ensures quality and interchangeability

Professional Applications & Engineering Value

These M8 hex head screws deliver exceptional engineering value in industrial settings where vibration resistance and structural integrity are critical. The Class 8.8 steel construction combined with Rockwell C21 hardness provides reliable performance in machinery assembly, construction frameworks, and equipment manufacturing. The coarse thread metric design with 1.25mm pitch ensures quick installation and superior holding power in various materials. The zinc plated finish protects against corrosion in environments exposed to moisture and chemicals, while the fully threaded configuration maximizes engagement depth for secure connections in both thick and thin materials.

Specification Summary & Compliance

This metric hex screw features M8 x 1.25mm coarse threading with Class 6h thread fit tolerance, ensuring precise dimensional accuracy. Manufactured to ISO 4017, DIN 933, and SAE J1199 specifications for consistent quality and performance. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring strict chemical substance control.