S-99461A204 Length 5/16" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic materials thanks to the precision tri-lobe shank design that displaces material to create strong, reliable threads
• Excellent corrosion resistance provided by 18-8 stainless steel construction, ensuring long-term durability in various environments
• Reduced risk of material cracking with advanced thread forming (TRS) technology that forms threads without cutting or removing material
• Secure and efficient installation enabled by the Phillips No. 1 drive style, offering good torque transfer and cam-out resistance
• Optimized for plastic assembly with a blunt tip design that helps prevent damage to delicate plastic components during installation
• Compliance with stringent environmental regulations including RoHS 3 and REACH, making them suitable for global industrial applications
• Consistent performance with fully threaded 24 TPI design providing maximum thread engagement and pull-out strength

Professional Applications & Engineering Value

These thread forming screws are specifically engineered to address common fastening challenges in plastic applications where traditional fasteners often fail. The tri-lobe shank cross-section and TRS thread forming technology work together to compress and displace plastic material rather than cutting through it, eliminating chips and reducing stress concentration that can lead to cracking. This makes them ideal for plastic assembly in electronics enclosures, automotive components, and consumer products where material integrity is critical. The 18-8 stainless steel construction ensures these Phillips pan head screws maintain their corrosion resistance even in humid or chemically challenging environments, while the rounded head profile provides a finished appearance without sharp edges. When used with the recommended No. 46 drill bit (0.081" diameter), these fasteners deliver predictable, repeatable performance in production environments.

Specification Summary & Compliance

This No. 3 x 5/16" TRS tapping screw features a 0.099" thread diameter with 24 threads per inch in right-hand direction, manufactured to precise dimensional standards for consistent performance. The screw is fully threaded with a standard pan head profile measuring 0.193" in diameter and 0.071" in height. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures these fasteners meet current environmental and safety standards for industrial use worldwide. The thread forming design follows established engineering principles for plastic fastening applications, providing reliable performance without the need for additional locking elements or thread-cutting operations.