S-99512A624 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic materials thanks to the Tri-Lobe shank design that displaces material to create secure, vibration-resistant threads
• Enhanced torque transmission and reduced cam-out with the Torx T10 drive, allowing for higher tightening forces and improved assembly efficiency
• Excellent corrosion resistance provided by the zinc-plated steel construction, ensuring long-term durability in various industrial environments
• Reliable thread forming action that creates strong, clean threads in plastic without chipping or cracking the material
• Full threading along the 1-1/4" length for maximum grip and consistent clamping force throughout the entire engagement area
• Simplified installation process with compatibility for standard No. 37 drill bits (0.104" diameter), reducing preparation time and tooling requirements
• Broad industrial compliance meeting RoHS 3 and REACH environmental standards for global manufacturing applications

Professional Applications & Engineering Value

These No. 4-20 thread forming screws are specifically engineered to address common challenges in plastic fastening applications where material integrity and joint reliability are critical. The zinc-plated steel construction provides essential corrosion protection while maintaining the strength needed for demanding industrial environments. The unique Tri-Lobe shank design solves the problem of thread stripping in plastic by displacing material rather than cutting it, creating stronger threads that resist vibration loosening. The Torx T10 drive system enables higher torque application without screw head damage, significantly reducing assembly time and improving production efficiency. These TRS tapping screws are ideal for automotive components, electronic enclosures, and consumer products where reliable plastic-to-plastic or plastic-to-metal connections are required.

Specification Summary & Compliance

These thread forming screws feature a No. 4-20 thread size with standard Class 2A tolerance, ensuring precise fit and consistent performance. The fully threaded 1-1/4" length with right-hand threading and blunt tip design provides optimal engagement in plastic substrates. Manufactured to industry standards for TRS (Thread Rolling Screws) with Tri-Lobe shank cross-section, these fasteners are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making them suitable for global industrial applications requiring environmental responsibility.