S-96880A246 4-40 x 3/4" ASME B18.6.3, FF-S-92, QQ-P-416, MS35206-219, NASM35206 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional Corrosion Resistance: Cadmium plating provides superior protection against rust and environmental degradation, extending service life in demanding conditions.
• High Tensile Strength: Rated at 60,000 psi, this screw reliably withstands high-stress applications without failure, ensuring joint integrity.
• Optimized Drive Engagement: The Phillips No. 1 drive and rounded pan head design facilitate efficient installation and reduce the risk of cam-out, speeding up assembly.
• Precision Thread Fit: Class 2A UNC coarse threads ensure consistent, reliable engagement with mating parts, minimizing cross-threading and simplifying installation.
• Broad Industry Compliance: Meets ASME B18.6.3 and other key standards (FF-S-92, QQ-P-416, MS35206-219, NASM35206), guaranteeing interchangeability and quality for critical assemblies.
• Environmental Responsibility: Compliant with RoHS 3 and REACH regulations, making these screws suitable for use in environmentally conscious and regulated industries.
• Full Threading for Maximum Grip: The 3/4" length is fully threaded, providing superior holding power across the entire fastener length for secure connections.

Professional Applications & Engineering Value

Engineered for reliability, this 4-40 UNC rounded pan head Phillips screw is a cornerstone component in precision assemblies. The cadmium-plated steel construction offers a robust barrier against corrosion, which is critical in industrial environments where moisture or chemicals are present. Its coarse thread (UNC) and Class 2A fit enable rapid and secure fastening in materials like aluminum and soft metals, reducing assembly time while preventing stripping. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures it can handle vibrational loads and maintain clamp force in applications from electronic enclosures to machinery panels. This makes it an indispensable industrial screw for OEMs and MRO professionals who require a dependable, standards-compliant fastener for high-performance and regulated applications.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, featuring a Class 2A thread fit for consistent assembly and a right-hand UNC coarse thread. Manufacturing and material specifications strictly conform to ASME B18.6.3, Fed. Spec. FF-S-92, QQ-P-416, MS35206-219, and NASM35206. The product is fully compliant with environmental regulations, including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets global standards for restricted substances.