S-99663A416 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and long-term outdoor applications.
• Efficient thread forming design creates strong, permanent threads in sheet metal without pre-tapping, reducing installation time and tooling costs.
• Versatile external hex/slotted drive allows for use with multiple tool types, providing flexibility in tight or varied workspaces.
• Integrated flange distributes clamping force evenly, preventing surface damage and improving joint integrity in thin materials.
• Full threading ensures maximum grip along the entire screw length, enhancing pull-out resistance in sheet metal assemblies.
• Compliance with RoHS 3 and REACH regulations guarantees safe, environmentally responsible use in industrial and consumer products.
• Optimized for 3/16" drill bits with precise thread diameter and pitch, ensuring reliable performance and reduced risk of material stripping.

Professional Applications & Engineering Value

This No. 12 x 1-1/4" flanged tapping screw in 316 stainless steel is engineered to address common challenges in sheet metal fabrication, such as corrosion-induced failure and installation inefficiency. Its thread forming (Type A/AB) technology eliminates the need for separate tapping operations, cutting labor time while forming secure, vibration-resistant threads that minimize loosening under stress. The external hex/slotted drive offers dual installation options, accommodating both power and manual tools in confined spaces. With a fully threaded shank and pointed tip, it ensures rapid penetration and uniform load distribution, making it a reliable choice for HVAC systems, electronic enclosures, and automotive panels where durability and regulatory compliance are critical.

Specification Summary & Compliance

This screw features a No. 12 size with a 0.216" thread diameter and 11 threads per inch, adhering to standard inch measurements for consistent fit. The thread forming tapping method (Type A/AB) and right-hand threading ensure compatibility with common sheet metal thicknesses up to 0.025". Manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, it is free of hazardous substances, supporting safe industrial and commercial use.