S-91280A216 M16 x 25 mm ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with Class 8.8 strength rating and 110,000 psi tensile strength for reliable performance in high-stress applications
• Enhanced durability and wear resistance thanks to Rockwell C21 hardness, ensuring long service life in demanding industrial environments
• Optimal thread engagement with M16 coarse (2mm pitch) fully threaded design for faster installation and secure fastening
• Precise torque application enabled by external hex drive and 24mm head width, preventing tool slippage and damage
• Consistent dimensional accuracy with Class 6g thread fit and ISO 4017 compliance, ensuring reliable interchangeability
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Corrosion-resistant black finish providing basic protection while maintaining cost-effectiveness for general industrial applications

Professional Applications & Engineering Value

These M16 hex head screws deliver exceptional engineering value in heavy-duty applications where high tensile strength and reliability are paramount. The Class 8.8 steel construction combined with Rockwell C21 hardness ensures these metric coarse thread screws withstand vibration, dynamic loads, and harsh operating conditions common in machinery assembly, structural steel connections, and industrial equipment manufacturing. The fully threaded design with 2mm pitch provides maximum thread engagement throughout the 25mm length, distributing stress evenly and preventing joint failure. The external hex drive allows for high torque application using standard tools, making installation efficient while the black finish offers basic corrosion protection for indoor industrial environments.

Specification Summary & Compliance

This hex head screw features precise Class 6g thread fit tolerance with M16x2mm metric coarse threading and right-hand thread direction. Manufactured to ISO 4017 specifications (equivalent to DIN 933) with dimensional accuracy including 24mm head width and 10.2mm head height. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while meeting international quality standards.