S-91280A557 M8 x 75 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

• Enhanced corrosion resistance with zinc plating for extended service life in demanding 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 critical industrial applications
• Coarse thread design (M8 x 1.25) enables faster installation and superior grip in various materials
• Partially threaded shank offers optimal clamping force distribution and prevents joint loosening
• External hex drive head allows for high-torque installation with standard tools
• Class 6h thread fit guarantees precise engagement and consistent performance

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these M8 hex head screws combine Class 8.8 steel construction with zinc plating to solve common engineering challenges. The coarse thread metric design ensures rapid assembly in machinery, structural frameworks, and equipment manufacturing, while the partially threaded configuration provides superior clamping force where full thread engagement isn't required. With Rockwell C21 hardness and 110,000 psi tensile strength, these external hex drive fasteners withstand extreme vibration and load conditions, making them ideal for automotive, construction, and heavy equipment applications where reliability is paramount.

Specification Summary & Compliance

Manufactured to exacting ISO 4014 and DIN 931 standards with Class 6h thread fit tolerance, these screws ensure dimensional precision and interchangeability. The SAE J1199 specification compliance guarantees consistent performance across industrial applications. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, these fasteners meet the latest international safety and sustainability requirements for industrial components.