S-91772A942 1/4"-28 x 7/16" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications.
• Precise thread engagement with Class 2A UNF fine threads ensuring secure, vibration-resistant fastening.
• Efficient installation facilitated by the Phillips No. 3 drive and standard pan head design for quick, tool-compatible assembly.
• Full-threaded length provides maximum grip and load distribution across the entire fastener.
• Compliance with industry standards including ASME B18.6.3, ensuring consistent quality and interchangeability.
• Environmental and safety adherence through RoHS 3 and REACH compliance, supporting sustainable manufacturing practices.

Professional Applications & Engineering Value

This 1/4"-28 UNF pan head machine screw is engineered to address critical industrial challenges, such as vibration loosening and corrosive degradation. The passivated 18-8 stainless steel material provides excellent resistance to oxidation and chemicals, making it suitable for marine, automotive, and electronics assemblies. Its UNF fine thread and Class 2A fit deliver precise torque control and reduced risk of thread stripping, while the Phillips drive ensures compatibility with standard tools for efficient maintenance. Fully threaded for uniform stress distribution, this screw enhances structural integrity in high-stress environments, supporting reliable performance in industrial fastening applications.

Specification Summary & Compliance

The screw adheres to Class 2A thread tolerance and UNF thread standards, manufactured under ASME B18.6.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.