S-95440A105 M3 x 12 mm ASTM A276 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh or marine environments.
• Enhanced durability and strength from a Rockwell B70 hardness and 70,000 psi tensile strength, ensuring reliable performance under load.
• Secure, flush installation thanks to the flat undercut head design, which minimizes protrusion and reduces the risk of snagging.
• Efficient assembly and removal with a 2 mm hex drive, providing a positive grip and reducing the chance of tool slippage.
• Consistent, reliable threading with a Class 6g fit and coarse M3 x 0.5 mm pitch, offering excellent engagement and vibration resistance.
• Long-lasting surface protection from the black oxide finish, which adds an extra layer of corrosion resistance and a professional appearance.
• Full compliance with industry standards including ASTM A276, RoHS 3, and REACH, ensuring material quality and environmental safety.

Professional Applications & Engineering Value

These M3 flat head screws are precision-engineered from 316 stainless steel to address common industrial challenges such as corrosion, vibration loosening, and space constraints. The black oxide finish enhances their natural resistance to oxidizing agents, making them a top choice for applications in chemical processing, marine hardware, and outdoor equipment where moisture and corrosive elements are prevalent. The fully threaded design and Class 6g thread fit ensure maximum holding power and uniform stress distribution, reducing the likelihood of joint failure. The undercut flat head allows for a countersunk, flush fit that is critical in assemblies requiring a smooth surface finish and aerodynamic profiles, such as in electronic enclosures, machinery panels, and automotive components. This combination of material properties and metric coarse threading delivers reliable fastening solutions that withstand demanding operational conditions.

Specification Summary & Compliance

This screw features precise dimensional tolerances, including a head diameter of 6 mm with a tolerance of -0.127 to 0.127 mm and a thread fit of Class 6g per ISO metric standards. It is manufactured in compliance with ASTM A276 for material consistency and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial applications.