S-90096A433 12-24 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-lasting performance in demanding industrial environments.
• High-strength thread cutting action (Type F) creates secure, permanent threads in materials like aluminum, brass, and cast iron without pre-tapped holes.
• Enhanced anti-loosening performance from the serrated locking flange, providing reliable vibration resistance in sheet metal and other applications.
• Quick and secure installation with external hex drive and standard 12-24 UNC coarse thread, compatible with common tools for efficient assembly.
• Optimal material compatibility designed for use with No. 11 drill bit (0.191" diameter), ensuring precise fit in specified materials.
• Full 1-inch thread engagement delivers maximum holding power across the entire screw length for critical fastening applications.
• Regulatory compliance assurance meeting ASME B18.6.3 standards and RoHS 3 directives for quality and environmental safety.

Professional Applications & Engineering Value

These 12-24 UNC zinc-plated steel tapping screws solve critical fastening challenges in aluminum, brass, cast iron, and sheet metal assemblies. The thread cutting design (Type F) eliminates the need for separate tapping operations, reducing installation time and labor costs in high-volume production. The serrated flange provides superior resistance to vibration-induced loosening, a common failure point in automotive, HVAC, and machinery applications. Manufactured from zinc-plated steel, these screws offer excellent corrosion protection while maintaining the strength required for structural fastening. The external hex drive ensures high torque transmission without cam-out, making them ideal for automated assembly systems and maintenance applications where reliability is paramount.

Specification Summary & Compliance

This No. 12 screw features 12-24 UNC coarse threads with Class 2A fit tolerance and fully threaded 1-inch length. Manufactured to ASME B18.6.3 specifications (SAE J933) with RoHS 3 (2015/863/EU) compliance. Designed for use with No. 11 drill bit (0.191" diameter) in aluminum, brass, cast iron, and sheet metal applications. The zinc-plated steel construction provides corrosion resistance while the external hex drive and serrated flange ensure secure installation and vibration resistance.