S-90087A707 12-24 x 3/4" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Self-tapping efficiency – Cuts precise threads in aluminum, brass, cast iron, and sheet metal without pre-threading, reducing assembly time and labor costs.
• Superior corrosion resistance – Zinc-plated steel construction provides durable protection against rust and environmental exposure in industrial settings.
• High-strength coarse threading – UNC coarse threads ensure rapid installation and excellent pull-out resistance in softer materials.
• Secure Phillips No. 3 drive – Offers reliable torque transfer and reduces cam-out risk during high-torque applications.
• Optimized pan head design – Rounded, low-profile head distributes clamping force evenly and resists surface marring.
• Full-thread engagement – Fully threaded shank maximizes grip length and holding power across the entire fastener length.
• Precision-matched drill bit compatibility – Designed for use with No. 8 drill bit (0.199"), ensuring clean, accurate pilot holes.

Professional Applications & Engineering Value

These 12-24 UNC thread cutting screws are engineered to address common challenges in metal fabrication and assembly, such as stripping, cross-threading, and material fatigue. The zinc-plated steel construction offers a cost-effective balance of strength and corrosion resistance, ideal for HVAC, automotive, and machinery enclosures. The Type F thread cutting design and blunt tip allow the screw to form mating threads in ductile metals like aluminum and brass without cracking or deforming the base material. This eliminates the need for tapped holes, streamlining production lines and reducing component inventory. With coarse UNC threading, these screws provide faster driving speeds and higher resistance to vibration loosening in sheet metal and cast iron applications, ensuring long-term joint integrity.

Specification Summary & Compliance

This screw meets ASME B18.6.3 dimensional and mechanical specifications (referencing SAE J933), ensuring consistent thread form (UNC 12-24), head geometry (pan style), and drive performance. Manufacturing adheres to RoHS 3 (2015/863/EU) compliance, guaranteeing restricted substance-free materials. The fully threaded design maintains uniform engagement, while the specified No. 8 drill bit size (0.199" diameter) ensures proper fit and maximum thread retention in recommended materials.