S-95893A392 Length 5/16" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic materials thanks to the advanced Tri-Lobe shank design that creates secure, vibration-resistant threads
• Maximum torque transfer and reduced cam-out with the precision Torx T8 drive, ensuring efficient installation and longer tool life
• Enhanced corrosion resistance through zinc-plated steel construction, providing durable performance in various industrial environments
• Streamlined installation process with the thread-forming (TRS) design that eliminates the need for pre-tapped holes in plastics
• Optimal flush mounting achieved with the standard 82° flat head profile, creating a clean finish in plastic assemblies
• Reliable full-length engagement with completely threaded shank, ensuring consistent clamping force along the entire fastener length
• Environmental regulation compliance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This No. 4-20 thread forming screw delivers exceptional value in plastic fastening applications where traditional fasteners fail. The zinc-plated steel construction provides necessary corrosion protection while maintaining the strength required for durable assemblies. Engineered with a Tri-Lobe shank cross-section and TRS thread forming technology, this screw displaces plastic material during installation to create strong, permanent threads that resist loosening under vibration - a critical advantage in automotive trim, electronic enclosures, and consumer products. The Torx T8 drive system enables higher torque application without stripping, while the flat head with 82° countersink ensures flush mounting for aesthetic and safety requirements. These features combine to solve common plastic fastening challenges including material cracking, thread stripping, and installation inefficiency.

Specification Summary & Compliance

This tapping screw features precise inch measurements including No. 4 diameter (0.112" thread diameter) with 20 TPI right-hand threads and 5/16" fully threaded length. The thread forming design requires a No. 37 drill bit (0.104" diameter) for proper hole preparation. Manufacturing complies with industry standards for flat head fasteners with 82° countersink angle. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial components.