S-91900A868 M8 x 25 mm ASTM F879M, ISO 7380 Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized Torx drive requiring matching tools, preventing unauthorized access in public or high-security environments
• Superior corrosion resistance through 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh industrial conditions
• Optimized thread engagement with Class 6g fit and coarse M8x1.25mm threading, providing secure fastening and reduced cross-threading risk
• High mechanical strength delivering 80,000 psi tensile strength and Rockwell B96 hardness for demanding structural applications
• Streamlined installation with fully threaded design and rounded button head profile, enabling flush mounting and reduced snagging
• Broad regulatory compliance meeting ASTM F879M, ISO 7380, RoHS 3, and REACH standards for global industrial acceptance
• Secure drive performance with T40 tamper-resistant Torx drive maintaining torque integrity during repeated installations

Professional Applications & Engineering Value

These M8 tamper-resistant button head screws address critical security and durability challenges across industrial sectors. The 18-8 stainless steel composition combined with passivated finish creates exceptional resistance to corrosion and chemical exposure, making them ideal for outdoor equipment, marine applications, and food processing machinery. The tamper-resistant Torx drive (T40 size) provides vital security where vandalism or unauthorized access is a concern, while the rounded button head design offers a low-profile finish that minimizes protrusion in assemblies. With coarse metric threading (M8x1.25mm) and Class 6g thread fit, these screws ensure reliable engagement in both metallic and composite materials, reducing installation time and improving joint integrity in production environments.

Specification Summary & Compliance

This fastener maintains Class 6g thread tolerance per metric standards with M8x1.25mm coarse threading and 25mm fully threaded length. Manufacturing complies with ASTM F879M and ISO 7380 specifications for dimensional accuracy and mechanical properties. The product is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to international environmental and safety regulations for industrial fastener applications.