S-99461A282 Length 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life in plastic assemblies.
• Exceptional pull-out resistance provided by the Tri-Lobe shank design, preventing screw back-out and ensuring a secure, vibration-resistant hold in plastic materials.
• Reduced installation stress and material cracking through advanced thread forming technology, which displaces material without cutting, preserving the integrity of plastic components.
• Efficient and reliable driving with a No. 1 Phillips drive, offering good torque transfer and reducing the risk of cam-out during installation.
• Optimized for plastic fastening with a blunt tip and specific thread design (0.112" diameter, 20 TPI), ensuring strong thread engagement without stripping or damaging the host material.
• Full environmental compliance, meeting RoHS 3 and REACH standards, making these screws safe for use in regulated industries and global markets.
• Consistent and reliable performance due to fully threaded length, providing maximum holding power along the entire fastener in various plastic thicknesses.

Professional Applications & Engineering Value

These 316 stainless steel TRS tapping screws are engineered to solve common fastening challenges in plastic assembly applications. The thread forming action and Tri-Lobe shank work in tandem to create strong, durable threads in plastic substrates without generating chips, eliminating cleanup and potential failure points. This design is critical for applications where vibration resistance and long-term reliability are paramount, such as in electronic enclosures, automotive plastic trim, and consumer appliances. The use of 316 stainless steel provides excellent resistance to chemicals and moisture, preventing corrosion that could compromise the joint in demanding environments. The Phillips drive ensures widespread compatibility with common tools, streamlining the assembly process in high-volume production settings.

Specification Summary & Compliance

This No. 4 x 1/4" screw features a 0.112" thread diameter with 20 threads per inch and a standard pan head profile. The screw is fully threaded with a blunt tip and is designed for use with a No. 44 drill bit (0.086" diameter). Manufactured as a Thread Rolling Screw (TRS) for plastic, it complies with major environmental regulations, including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006).