S-90087A848 5-40 x 1/4" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior thread-cutting performance in aluminum, brass, cast iron, and sheet metal without pre-tapping, reducing installation time and labor costs.
• Enhanced corrosion resistance with zinc-plated steel construction, ensuring long-term durability in various industrial environments.
• Reliable fastening with coarse UNC threads providing excellent grip and vibration resistance in softer materials.
• Effortless installation with Phillips No. 2 drive and standard pan head design, compatible with common tools for quick assembly.
• Full threading along the entire length maximizes holding power and distributes stress evenly for secure connections.
• Precision-matched drill bit size (No. 35/0.11") ensures optimal hole preparation, minimizing material damage and ensuring consistent performance.
• Compliance with ASME B18.6.3 and SAE J933 standards guarantees consistent quality, interchangeability, and reliability in professional applications.

Professional Applications & Engineering Value

These 5-40 UNC thread cutting screws are engineered to address common challenges in fastening softer metals like aluminum, brass, cast iron, and sheet metal. The zinc-plated steel material provides essential corrosion protection, extending service life in demanding conditions. The thread cutting Type F design with a blunt tip and coarse UNC thread spacing allows the screw to form its own mating threads, eliminating the need for pre-tapped holes and reducing assembly steps. This is particularly valuable in high-volume production environments where efficiency is critical. The fully threaded shank ensures maximum engagement and pull-out resistance, while the Phillips No. 2 drive and pan head offer secure tool engagement and a low-profile finish. Ideal for industrial fastening in machinery, enclosures, and metal fabrications, these screws deliver reliable performance, reduce the risk of strip-out, and maintain joint integrity under vibration and load.

Specification Summary & Compliance

This screw features a 5-40 UNC coarse thread with standard Class 2A tolerance for reliable fit. The zinc-plated steel construction meets industry standards for corrosion resistance. It is manufactured in compliance with ASME B18.6.3 and SAE J933 specifications, ensuring dimensional accuracy, mechanical properties, and performance consistency. The product conforms to common industry requirements, though specific RoHS or REACH status should be verified per batch if needed for environmental compliance.