S-91249A047 2-56 x 7/16" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coated 18-8 stainless steel, ideal for harsh industrial environments.
• High tensile strength of 70,000 PSI ensures reliable performance under heavy loads and vibration.
• Rockwell B70 hardness provides excellent wear resistance and long-term durability.
• Class 2A thread fit with UNC coarse threads for easy installation and secure fastening in various materials.
• Fully threaded design offers maximum grip and uniform stress distribution along the entire length.
• Pan head with No. 1 Phillips drive allows for efficient torque application and reduced cam-out risk.
• Compliance with ASME B18.6.3 guarantees consistent quality and interchangeability in mechanical assemblies.

Professional Applications & Engineering Value

These 2-56 UNC rounded head Phillips screws are engineered to address common industrial challenges, such as corrosion in humid or chemical-exposed settings. The black-oxide 18-8 stainless steel construction not only enhances aesthetic appeal but also provides an extra layer of protection against rust, making them suitable for outdoor equipment, automotive components, and electronic enclosures. The coarse thread design ensures quick assembly and strong holding power in softer materials like plastics or aluminum, reducing the risk of stripping. With a fully threaded shank and precise Class 2A fit, these screws deliver consistent clamping force, minimizing loosening in high-vibration applications and improving overall assembly reliability for industrial and machinery use.

Specification Summary & Compliance

These screws feature a 2-56 UNC coarse thread with Class 2A tolerance for precise fit, manufactured in accordance with ASME B18.6.3 standards. They are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial markets.