S-99461A140 Length 5/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in humid or chemical environments
• Excellent thread-forming capability through the Tri-Lobe shank design, creating secure, vibration-resistant threads in plastic materials
• Optimized drive engagement with Phillips No. 1 drive for efficient installation and reduced cam-out during assembly
• Maximum holding power achieved through fully threaded design and 20 TPI configuration for superior pull-out resistance
• Precision compatibility with No. 37 drill bit (0.104" diameter) for proper hole preparation and optimal thread formation
• Enhanced material displacement with blunt tip design that minimizes stress cracking in plastic substrates
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

These 18-8 stainless steel TRS plastic tapping screws deliver exceptional performance in plastic assembly applications where corrosion resistance and vibration durability are critical. The thread-forming Tri-Lobe shank design eliminates the need for pre-tapped holes while creating strong, permanent threads that resist loosening under dynamic loads. The Phillips drive system provides reliable installation torque transfer, making these screws ideal for high-volume production environments. Engineered specifically for plastic fastening applications, the combination of right-hand threading and 20 TPI configuration ensures optimal material engagement without compromising structural integrity. These characteristics make them particularly valuable in industrial equipment, electronic enclosures, and automotive components where plastic-to-plastic or plastic-to-metal connections require secure, long-lasting fastening solutions.

Specification Summary & Compliance

This No. 4 x 5/8" TRS plastic tapping screw features precision 0.112" thread diameter with 20 threads per inch and fully threaded configuration for maximum engagement. The Tri-Lobe shank cross-section and thread forming tapping method ensure proper material displacement in plastic substrates. Manufactured to industry standards with RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, these screws meet stringent environmental regulations for industrial use. The rounded pan head style with 0.219" head diameter provides adequate bearing surface while the blunt tip prevents material damage during installation.