S-99461A221 Length 1 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ensuring long-term reliability in humid or harsh industrial environments
• Exceptional holding power in plastic materials due to the tri-lobe shank design that displaces material to create secure, vibration-resistant threads
• Efficient thread forming capability eliminates the need for pre-tapped holes, reducing assembly time and labor costs
• Optimized drive engagement with Phillips No. 3 drive style provides reliable torque transfer and reduces cam-out risk during installation
• Full threading along the 1-1/2" length ensures maximum thread engagement and uniform stress distribution across plastic components
• Standard pan head profile offers a low-profile finish with good bearing surface for consistent clamping force
• Compliance with international environmental standards including RoHS 3 and REACH, making them suitable for global supply chains

Professional Applications & Engineering Value

This 1/4"-10 TRS Type A tapping screw delivers exceptional engineering value for plastic fastening applications where material integrity and joint reliability are critical. The thread forming design with its tri-lobe shank cross-section creates strong, permanent threads in plastic substrates without generating chips or debris that could compromise electronic components or moving parts. The 18-8 Stainless Steel material provides excellent corrosion resistance, making these screws ideal for outdoor equipment, marine applications, or environments with exposure to chemicals or moisture. The combination of Phillips drive No. 3 and blunt tip design ensures precise alignment and controlled installation, reducing the risk of plastic cracking or stress concentration. These characteristics make this fastener particularly valuable in plastic assembly for automotive trim, electrical enclosures, consumer products, and industrial equipment where vibration resistance and long-term performance are essential.

Specification Summary & Compliance

This TRS Type A tapping screw features precision 1/4"-10 thread configuration with fully threaded design and thread forming capability for plastic materials. The screw maintains dimensional accuracy with 0.492" head diameter and 1-1/2" length, compatible with No. 4 drill bit (0.209" diameter) for proper hole preparation. Manufactured from 18-8 Stainless Steel with Phillips pan head and right-hand thread direction. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications while meeting international standards for hazardous substance restrictions.