S-90087A885 12-24 x 2" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior self-tapping performance in aluminum, brass, cast iron, and sheet metal without pre-tapped holes, reducing assembly time and labor costs.
• Enhanced corrosion resistance with zinc-plated steel construction, ensuring long-term durability in various industrial environments.
• High-strength UNC coarse threads provide excellent grip and vibration resistance in coarse-grained materials.
• Efficient Phillips No. 3 drive allows for quick installation with common tools, minimizing cam-out and improving workflow efficiency.
• Precision compatibility with No. 11 drill bits (0.191" diameter), ensuring accurate hole sizing and secure fastening.
• Fully threaded 2" length offers maximum thread engagement for stronger, more reliable connections in thicker materials.
• Standard-compliant design meeting ASME B18.6.3 specifications, guaranteeing consistent quality and interchangeability.

Professional Applications & Engineering Value

These 12-24 UNC thread cutting screws are engineered to solve common fastening challenges in metalworking and assembly. The zinc-plated steel material provides a protective barrier against rust, extending service life in humid or outdoor conditions. The F-type tapping screw design with a blunt tip and coarse thread spacing ensures easy starting and strong thread formation in aluminum, brass, cast iron, and sheet metal, eliminating the need for separate tapping operations. This reduces production steps, minimizes tool wear, and prevents material stripping. The pan head with Phillips drive offers a low-profile, secure fit that resists loosening under vibration, making these screws ideal for industrial fasteners in machinery, automotive, and construction applications where reliability is critical.

Specification Summary & Compliance

This product adheres to ASME B18.6.3 standards, ensuring dimensional accuracy and performance consistency. The UNC thread follows standard coarse thread specifications with a right-hand thread direction and fully threaded design for uniform engagement. Manufactured from zinc-plated steel, it meets common industry requirements for corrosion protection and mechanical strength. Compliance with specifications such as SAE J933 is confirmed, supporting use in regulated environments. The screw is designed for use with a No. 11 drill bit (0.191" diameter), providing precise fit and optimal thread cutting efficiency.