S-90604A552 4-40 x 1/4" ASME B18.6.3 Stainless Steel Pan Head Combination Phillips/Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable, long-lasting fastening
• Precision thread fit with Class 2A UNC coarse threads ensuring smooth installation and secure connections
• Dual-drive convenience featuring both Phillips and Slotted drive (No. 1 size) for flexible tool compatibility
• Fully threaded design providing maximum grip and uniform load distribution across the entire length
• Compliant with major standards including ASME B18.6.3, RoHS 3, and REACH for guaranteed quality and safety
• Optimized pan head profile offering a low-profile, rounded design that resists snagging and provides a professional finish

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 4-40 UNC Rounded Head Screws deliver critical performance where corrosion resistance and mechanical reliability are paramount. The 18-8 Stainless Steel construction, enhanced by a passivated finish, effectively combats oxidation and chemical exposure in environments like marine equipment, food processing machinery, and electronic enclosures. The fully threaded design with Class 2A fit ensures consistent clamping force and vibration resistance, reducing the risk of loosening in dynamic assemblies. With a Phillips/Slotted drive, installation is versatile and efficient, accommodating various tools without stripping. These screws are ideal for securing components in industrial automation, instrumentation, and OEM machinery, providing a dependable fastening solution that meets rigorous engineering standards.

Specification Summary & Compliance

This screw features a 4-40 UNC coarse thread with Class 2A thread fit for standard tolerance and easy assembly. It is manufactured in compliance with ASME B18.6.3 specifications, ensuring dimensional accuracy and performance consistency. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations. With a length of 1/4" and a rounded pan head design, it is suitable for a wide range of industrial fastening applications requiring reliability and regulatory conformity.