S-91772A508 2-56 x 1 3/8" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• High tensile strength of 70,000 psi ensures reliable, long-lasting fastening in demanding applications
• Excellent thread engagement with Class 2A fit UNC coarse threads for quick installation and secure hold
• Optimized drive performance with Phillips No. 1 drive style preventing cam-out and enabling efficient assembly
• Full threading along the 1-3/8" length provides maximum grip and uniform load distribution
• Standard pan head design offers a low-profile, rounded finish that resists snagging and enhances safety
• Compliance with major industry standards including ASME B18.6.3, ensuring consistent quality and interchangeability

Professional Applications & Engineering Value

These 2-56 UNC pan head Phillips screws are engineered to address common industrial fastening challenges, particularly where corrosion resistance and mechanical reliability are critical. The passivated 18-8 stainless steel material provides exceptional protection against rust and chemical exposure, making these screws ideal for use in electronics, machinery, marine equipment, and outdoor applications. The coarse UNC thread and Class 2A thread fit ensure easy alignment and reduced cross-threading risks during high-volume assembly. With a fully threaded design and Phillips No. 1 drive, these fasteners deliver consistent clamping force and efficient installation using standard tools, minimizing downtime and maintenance costs in production environments.

Specification Summary & Compliance

This product features precise Class 2A thread fit with UNC coarse threads (2-56 size) and adheres to ASME B18.6.3 manufacturing specifications for dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in restricted substance-sensitive applications. The screw maintains a tensile strength of 70,000 psi and is supplied in a fully threaded, 1-3/8" length configuration for reliable performance across industrial fastening requirements.