S-91280A560 M8 x 90 mm ISO 4014, DIN 931, 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 that protects against rust and extends service life in demanding environments
• High tensile strength of 110,000 psi ensures reliable performance under heavy loads and vibration, reducing failure risks
• Class 8.8 strength grade provides excellent durability and load-bearing capacity for critical industrial applications
• Partially threaded design allows for secure clamping while minimizing thread damage during installation
• External hex drive and hex head enable easy installation and removal with standard tools, improving assembly efficiency
• Precision Class 6h thread fit ensures smooth engagement and consistent performance in metric assemblies
• Compliance with ISO 4014, DIN 931, and SAE J1199 guarantees interchangeability and reliability in global engineering projects

Professional Applications & Engineering Value

This M8 hex head screw is engineered to address common industrial challenges such as joint integrity and environmental exposure. The Class 8.8 steel construction, combined with a Rockwell C21 hardness, provides exceptional resistance to shear and tensile stresses, making it ideal for machinery, structural frameworks, and automotive assemblies. The zinc-plated finish offers a protective barrier against moisture and chemicals, reducing maintenance needs in harsh conditions. Its coarse thread with 1.25 mm pitch ensures quick assembly and strong holding power, while the partially threaded shank concentrates stress away from the thread roots, enhancing fatigue resistance. Suitable for right-hand thread applications in construction and manufacturing, this fastener delivers consistent performance where precision and durability are paramount.

Specification Summary & Compliance

This screw adheres to precise dimensional tolerances, including a Class 6h thread fit per metric standards, ensuring compatibility with M8 nuts and threaded holes. It meets ISO 4014, DIN 931, and SAE J1199 specifications for hex head bolts, covering dimensions, mechanical properties, and testing requirements. Additionally, it is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, confirming the absence of hazardous substances and supporting safe, sustainable use in industrial sectors.