S-91772A266 2-56 x 1 1/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with passivated 18-8 stainless steel construction for long-term reliability in harsh environments
• Superior mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness to withstand high-stress applications
• Optimized drive engagement through Phillips No. 1 drive design for secure torque transmission and reduced cam-out risk
• Reliable thread performance with Class 2A UNC coarse threads ensuring consistent fit and vibration resistance
• Maximum fastening coverage with fully threaded 1-1/4" length for enhanced grip and load distribution
• Streamlined assembly process featuring standard pan head profile for easy installation in confined spaces
• Industry compliance assurance meeting ASME B18.6.3 specifications for dimensional accuracy and performance

Professional Applications & Engineering Value

These 2-56 UNC pan head Phillips screws deliver critical engineering solutions for industrial applications where corrosion resistance and mechanical integrity are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against oxidation and chemical exposure, making them ideal for manufacturing equipment, electronic enclosures, and marine components. The coarse UNC threading with Class 2A fit ensures rapid installation and secure fastening in various materials, while the fully threaded design maximizes engagement depth for superior pull-out resistance. The combination of 70,000 psi tensile strength and Rockwell B70 hardness guarantees reliable performance in high-vibration environments, preventing fastener failure and reducing maintenance requirements across machinery, automotive, and aerospace assemblies.

Specification Summary & Compliance

Manufactured to precise ASME B18.6.3 standards with Class 2A thread fit tolerances ensuring dimensional accuracy and interchangeability. The UNC coarse thread profile (2-56) provides optimal performance in most industrial materials. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and restricted substance control. The inch system measurements maintain consistency with North American industrial specifications, while the right-hand thread direction and standardized pan head profile ensure compatibility with existing assembly processes and tooling.