S-90434A125 Length 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior plastic fastening performance with TRS thread forming technology that creates strong, permanent threads without chips or debris
• Enhanced corrosion resistance through zinc-plated steel construction for extended service life in industrial environments
• Optimized drive efficiency with Phillips No. 1 drive style providing secure tool engagement and reduced cam-out risk
• Flush mounting capability with standard flat head design and 82° countersink angle for smooth, professional finishes
• Excellent holding power achieved through tri-lobe shank cross-section that displaces material for superior resistance to vibration loosening
• Precision installation guidance with recommended No. 37 drill bit (0.104" diameter) ensuring proper hole preparation
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

These No. 4 x 1/4" zinc-plated steel tapping screws deliver exceptional value in plastic assembly applications where traditional fasteners fail. The TRS thread forming technology eliminates the risk of plastic cracking or stress fractures by gradually displacing material rather than cutting it, creating stronger threads with superior pull-out resistance. The tri-lobe shank cross-section provides enhanced anti-vibration characteristics, crucial for applications subject to movement or thermal cycling. With 20 threads per inch and fully threaded design, these screws distribute clamping force evenly, preventing localized stress points in plastic components. The Phillips flat head configuration ensures flush mounting while the zinc plating provides essential corrosion protection for industrial environments, making these fasteners ideal for electronics enclosures, automotive trim, and consumer product assemblies where reliability and aesthetics matter.

Specification Summary & Compliance

These thread forming tapping screws feature precise dimensional specifications including 0.112" thread diameter, 1/4" length, and standard 82° countersink angle. Manufactured to TRS type standards with right-hand threading and 20 threads per inch precision. The screws demonstrate full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. Installation is optimized with recommended No. 37 drill bit (0.104" diameter) preparation for proper thread formation in plastic materials.