S-91500A322 8-32 x 2 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments and chemical exposure
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B80 hardness for reliable, long-term fastening under stress
• Precise thread engagement with Class 2A thread fit and UNC coarse threading, ensuring consistent installation and vibration resistance
• Optimized flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
• Efficient installation using No. 2 Phillips drive, reducing slippage and tool wear during assembly
• Full-threaded design providing maximum grip along the entire 2-1/2" length for enhanced load distribution
• Regulatory compliance meeting ASME B18.6.3, RoHS 3, and REACH standards for safe, industry-approved usage

Professional Applications & Engineering Value

These 8-32 UNC flat head Phillips screws are engineered to address critical challenges in industrial and marine environments where corrosion resistance and structural integrity are paramount. The 316 stainless steel material, combined with a passivated finish, provides exceptional protection against saltwater, chemicals, and oxidation, making them ideal for offshore equipment, chemical processing plants, and food-grade machinery. The fully threaded coarse UNC design ensures rapid installation and superior holding power in soft materials or pre-tapped holes, while the flat head profile with 82° countersink allows for flush mounting in panels and assemblies, eliminating protrusions that could snag or collect debris. With a 70,000 psi tensile strength, these screws maintain clamp load under dynamic stresses, reducing maintenance frequency and downtime in high-vibration applications such as conveyor systems, pump housings, and structural frameworks.

Specification Summary & Compliance

This product adheres to Class 2A thread fit tolerances per UNC standards, ensuring precise dimensional accuracy and interchangeability. Manufacturing and quality control follow ASME B18.6.3 specifications for consistent performance. Environmental and safety compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances. Thread direction is right-hand, with a coarse 8-32 UNC thread size and full threading along the 2-1/2" length.