S-90087A846 4-40 x 1" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-term durability in harsh industrial environments.
• Efficient self-tapping installation in aluminum, brass, cast iron, and sheet metal without pre-threading, reducing assembly time and labor costs.
• Reliable thread engagement with coarse UNC threads and blunt tip design, minimizing material stress and preventing stripping in softer metals.
• Secure fastening with Phillips No. 1 drive, providing excellent torque transfer and reducing the risk of cam-out during installation.
• Full threading along the 1" length ensures maximum grip and uniform load distribution across the fastened materials.
• Compliance with ASME B18.6.3 and SAE J933 standards, guaranteeing consistent quality, dimensional accuracy, and interchangeability.
• Optimized for use with No. 41 drill bit (0.096"), simplifying hole preparation and ensuring precise fit for enhanced joint integrity.

Professional Applications & Engineering Value

These 4-40 UNC thread cutting screws are engineered to address common challenges in fastening non-ferrous metals and sheet materials. The zinc-plated steel material provides essential corrosion protection, extending service life in demanding applications like machinery assembly, HVAC systems, and automotive components. The Type F thread cutting design and coarse UNC thread form enable efficient tapping in aluminum, brass, and cast iron without requiring pre-tapped holes, reducing installation steps and potential errors. The fully threaded configuration and blunt tip enhance pull-out resistance and minimize cracking in thin sheet metal. By meeting ASME B18.6.3 specifications, these screws ensure reliable performance in high-vibration environments, making them ideal for industrial maintenance, construction, and mechanical fastening where precision and durability are critical.

Specification Summary & Compliance

This product adheres to Class 2A thread tolerances per UNC standards, with a thread size of 4-40 and coarse spacing for robust fastening. Manufacturing and dimensional consistency are verified under ASME B18.6.3 and SAE J933 specifications. The screws are fully compliant with RoHS and REACH environmental regulations, ensuring safe use in various industrial sectors without hazardous substances.