S-91280A276 M6 x 70 mm ISO 4014, DIN 931 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with 110,000 psi tensile strength and Class 8.8 grade, ensuring reliable performance in demanding applications
• Enhanced corrosion resistance and durability from steel construction with Rockwell C21 hardness for long service life
• Easy installation and removal thanks to the external hex drive and 10 mm head width, compatible with standard tools
• Secure fastening in various materials with M6 coarse threading (1 mm pitch) and Class 6g thread fit, reducing cross-threading risks
• Versatile partial threading design (18 mm min thread length on 70 mm shaft) for precise grip and alignment in assemblies
• Compliance with international standards including ISO 4014/DIN 931, ensuring interchangeability and quality consistency
• Environmentally safe usage with RoHS 3 and REACH compliance, meeting strict regulatory requirements

Professional Applications & Engineering Value

This M6 hex head screw delivers exceptional engineering value in industrial settings where vibration resistance and structural integrity are critical. The Class 8.8 steel construction provides high tensile strength, preventing failure under dynamic loads in machinery, automotive, and construction assemblies. Its coarse thread metric design (M6 x 1 mm) ensures quick installation and reliable holding power in softer materials or where frequent disassembly is needed. The partially threaded 70 mm length allows unthreaded shank sections to act as precision dowels, minimizing shear stress. With an external hex drive and right-hand thread, it offers tool compatibility and efficient fastening cycles, reducing labor time while meeting DIN 931/ISO 4014 specifications for consistent performance.

Specification Summary & Compliance

This fastener adheres to ISO 4014 where identical to DIN 931, with precise Class 6g thread fit tolerance for metric coarse threads. Manufacturing follows standardized dimensions: M6 x 1 mm thread pitch, 70 mm length, and partial threading starting at 18 mm minimum. It fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring no restricted hazardous substances are used. The Class 8.8 strength grade corresponds to 110,000 psi tensile strength and Rockwell C21 hardness, validated under industrial fastener standards.