S-90317A402 M2.5 x 5 mm ASME B18.13.1M Stainless Steel Pan Head Phillips Screws with External-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance with integrated external-tooth lock washer to maintain secure fastening in high-motion environments.
• Excellent corrosion resistance provided by 18-8 stainless steel construction and passivated finish for long-term durability in harsh conditions.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness to withstand demanding loads without failure.
• Reliable thread engagement due to Class 6g coarse thread fit, ensuring easy assembly and consistent performance in metric applications.
• Convenient installation with Phillips No. 1 drive and rounded pan head design for efficient driving and reduced tool slippage.
• Full-threaded design maximizes grip length and load distribution across the entire fastener for enhanced holding power.
• Regulatory compliance meets ASME B18.13.1M, RoHS 3, and REACH standards for safe, quality-assured industrial use.

Professional Applications & Engineering Value

This M2.5 x 0.45mm metric screw with external-tooth lock washer is engineered to address critical challenges in industrial assembly, such as loosening under vibration and exposure to corrosive elements. The combination of 18-8 stainless steel and a passivated finish ensures reliable performance in moist or chemically aggressive environments, reducing maintenance needs and downtime. The coarse thread and Class 6g tolerance facilitate quick, precise installation in machinery, electronics, and automotive components, while the Phillips drive and rounded pan head offer user-friendly application without compromising on torque transfer. Ideal for securing panels, brackets, and moving parts, this fastener delivers consistent vibration resistance and long-term structural integrity, making it a trusted choice for engineers seeking durability and compliance in demanding settings.

Specification Summary & Compliance

This screw features a metric thread size M2.5 with 0.45 mm coarse pitch and Class 6g thread fit for precise dimensional accuracy. It is manufactured in accordance with ASME B18.13.1M specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial components.