S-99461A120 Length 3/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring longevity in humid or demanding environments
• Excellent holding power in plastic materials due to the Tri-Lobe shank design, which reduces material stress and prevents stripping
• Efficient thread forming with TRS type, creating strong, reliable threads without pre-tapping in plastics
• Easy installation and removal with Phillips drive and No. 1 drive size, minimizing cam-out and tool slippage
• Secure seating and uniform appearance from the pan head design, providing a flush finish and consistent clamping force
• Reduced risk of material cracking with a blunt tip, allowing for controlled entry and less stress on plastic components
• Environmental and regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in various industries

Professional Applications & Engineering Value

This No. 4 x 3/8" TRS thread forming screw is specifically engineered for plastic fastening applications, where traditional screws may cause cracking or weak holds. Made from 18-8 stainless steel, it offers exceptional corrosion resistance, ideal for outdoor electronics, automotive interiors, and consumer appliances exposed to moisture. The Tri-Lobe shank cross-section and thread forming design displace plastic material gently, forming durable threads that resist loosening under vibration. Combined with a Phillips drive and pan head, it ensures quick, secure installations without damaging delicate plastic substrates, reducing assembly time and improving product reliability in high-volume manufacturing.

Specification Summary & Compliance

This screw adheres to standard inch measurements with a thread diameter of 0.112" and approximately 20 threads per inch, ensuring precise fits in pre-drilled holes (recommended drill bit size No. 37, 0.104" diameter). It features a fully threaded, right-hand design with a blunt tip for controlled penetration in plastics. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it meets stringent environmental and safety standards for industrial use.