S-99512A216 Length 3/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic materials thanks to the TRS thread-forming design that creates strong, permanent threads without pre-drilling in most applications
• Reduced cam-out and enhanced torque transmission with the Torx Plus IP10 drive system, allowing for higher installation torque and preventing tool slippage
• Excellent corrosion resistance provided by zinc-plated steel construction, ensuring long-term durability in various environmental conditions
• Optimized material displacement and reduced stress cracking through the tri-lobe shank design, particularly beneficial for plastic assemblies
• Simplified installation process with the blunt tip design that aligns perfectly without damaging material surfaces during insertion
• Secure fastening in right-hand threaded applications with fully threaded 3/8" length providing maximum engagement and pull-out resistance
• Environmental compliance assurance meeting RoHS 3 and REACH standards for responsible manufacturing and global market acceptance

Professional Applications & Engineering Value

This zinc-plated steel TRS plastic tapping screw delivers exceptional engineering value in plastic assembly applications where traditional fastening methods often fail. The thread forming capability eliminates the need for threaded inserts while creating stronger, more reliable connections in thermoplastics and other plastic materials. The Torx Plus IP10 drive system addresses common installation challenges by providing superior torque transfer, reducing operator fatigue, and minimizing damage to drive features during high-volume production. The tri-lobe shank cross-section strategically displaces material during installation, creating secure locking threads while minimizing hoop stress that can lead to plastic cracking. These engineered features make this No. 4-20 tapping screw ideal for automotive trim, electronic enclosures, consumer products, and industrial equipment where vibration resistance and long-term reliability in plastic components are critical.

Specification Summary & Compliance

This precision fastener features a No. 4-20 thread size with 0.112" thread diameter and 20 threads per inch in right-hand direction. The 3/8" length pan head screw with standard rounded profile provides consistent seating surfaces. Manufactured to exacting standards with Class 2A thread tolerances for reliable performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global markets. Recommended for use with No. 37 drill bit (0.104" diameter) when pre-drilling is required for specific applications.