S-99663A219 Length 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and outdoor applications.
• Efficient thread forming creates strong, durable threads in sheet metal without pre-tapping, reducing installation time and tooling costs.
• Secure, high-torque fastening enabled by the external hex/slotted head design, allowing for use with standard tools and preventing stripping.
• Enhanced load distribution from the integrated flange, which helps prevent pull-through and protects the sheet metal surface.
• Full-length threading ensures maximum grip and holding power along the entire 3/4" length for a reliable, vibration-resistant connection.
• Simplified installation with a pointed tip and specified No. 29 drill bit (0.136" diameter), enabling quick alignment and starting in pre-drilled holes.
• Compliance with strict environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global industrial supply chains.

Professional Applications & Engineering Value

This No. 8 x 3/4" 316 Stainless Steel Hex Head Tapping Screw is engineered to solve common fastening challenges in sheet metal assemblies. Its thread forming design displaces material to create a tight, zero-clearance fit, eliminating the need for separate nuts or tapped holes and significantly speeding up production. The use of 316 stainless steel provides exceptional resistance to chlorides and acidic environments, making it a reliable choice for marine, chemical processing, and food industry equipment where corrosion failure is a critical concern. The combination of a fully threaded shank, external hex/slotted drive, and flanged head delivers high clamp load, easy installation with common wrenches or screwdrivers, and superior resistance to vibration loosening, ensuring long-term structural integrity in demanding applications.

Specification Summary & Compliance

This screw conforms to standard inch dimensions: No. 8 size with a 0.164" thread diameter and 15 TPI right-hand thread. It is fully threaded and features a Class 2A thread fit for reliable engagement. The product is manufactured to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent international regulations for hazardous substances. Designed for use with a No. 29 drill bit (0.136" diameter), it is optimized for sheet metal applications up to a maximum drilling thickness of 0.025".