S-90909A849 M8 x 40 mm ISO 7380 Stainless Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments and extended service life
• Integrated flange design eliminates the need for a separate washer, providing a larger bearing surface for secure, stable fastening
• High tensile strength of 70,000 psi ensures reliable performance and structural integrity under significant load and vibration
• Convenient 5 mm hex drive allows for high-torque installation and removal with standard tools, speeding up assembly
• Fully threaded coarse pitch (M8 x 1.25 mm) enables faster installation and superior holding power in a wide range of materials
• Rounded button head profile offers a low-profile, aesthetically pleasing finish that reduces the risk of snagging
• Guaranteed industrial compliance with ISO 7380 for dimensional accuracy and RoHS 3/REACH for environmental safety

Professional Applications & Engineering Value

This M8 flanged button head screw is engineered to solve critical challenges in demanding industrial applications. The combination of 316 stainless steel and a passivated finish provides exceptional resistance to chemicals, saltwater, and other corrosive agents, making it a top choice for marine equipment, chemical processing plants, and outdoor machinery. The integrated flange distributes clamping force effectively, preventing surface damage and loosening under vibration. The fully threaded metric coarse thread (Class 6g fit) ensures rapid assembly and a secure grip in both soft and hard substrates. Its hex drive design is built for high-torque applications, providing the reliability needed for structural assemblies, machinery frames, and heavy-duty enclosures where failure is not an option.

Specification Summary & Compliance

This fastener features a Class 6g thread fit and is manufactured to the dimensional requirements of ISO 7380. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances. The screw is fully threaded with an M8 x 1.25 mm coarse thread, a length of 40 mm, and a flange diameter of 17.8 mm.