S-90087A107 4-40 x 3/8" 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-threading, reducing installation time and labor costs.
• Excellent corrosion resistance with zinc-plated steel construction, ensuring long-term durability in harsh industrial environments.
• Secure and efficient driving with Phillips No. 1 drive, minimizing cam-out and providing reliable torque transfer during installation.
• Optimized coarse UNC threading for faster insertion and strong holding power in various base materials.
• Blunt tip and fully threaded design prevents material splitting and ensures consistent engagement across the entire screw length.
• Compliance with ASME B18.6.3 standards guarantees dimensional accuracy, interchangeability, and reliable performance in demanding applications.
• RoHS 3 compliance ensures environmental safety and meets international regulatory requirements for hazardous substances.

Professional Applications & Engineering Value

These 4-40 UNC thread cutting tapping screws are engineered to solve common fastening challenges in metalworking and assembly. The zinc-plated steel material provides a protective barrier against oxidation, extending service life in moisture-prone settings. With a coarse thread and thread cutting (Type F) design, they create precise mating threads in aluminum, brass, cast iron, and sheet metal, eliminating the need for separate tapping operations and reducing production steps. The Phillips drive ensures compatibility with standard tools, while the blunt tip minimizes damage to thin materials. Ideal for HVAC, automotive, and machinery assembly, these screws deliver reliable self-tapping performance that maintains joint integrity under vibration and load.

Specification Summary & Compliance

This product features a 4-40 UNC coarse thread with standard Class 2A dimensional tolerances, ensuring precise fit and interchangeability. Manufactured in accordance with ASME B18.6.3 specifications, it guarantees consistent quality and performance. The screw is fully threaded, measures 3/8" in length, and is designed for use with a No. 41 drill bit (0.096" diameter). Compliance with RoHS 3 (2015/863/EU) is confirmed, affirming the absence of restricted hazardous substances for safe industrial use.