S-90627A115 Length 5/8" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black zinc-plated steel construction, extending service life in demanding environments
• Efficient thread forming design creates strong, vibration-resistant threads in plastic materials without pre-tapping
• Precise installation control with Phillips No. 1 drive and blunt tip to prevent material damage during assembly
• Maximum holding power through fully threaded design ensuring consistent engagement along the entire fastener length
• Optimized for plastic applications with DST thread forming technology that reduces stress cracking in plastic components
• Industry-standard compliance meeting ASME B18.6.3 specifications for reliable performance and interchangeability
• Simplified installation process with recommended No. 44 drill bit (0.086") for proper hole preparation

Professional Applications & Engineering Value

This No. 4-24 DST tapping screw delivers exceptional engineering value for plastic assembly applications where vibration resistance and material integrity are critical. The thread forming design creates permanent, high-strength threads in plastic substrates without removing material, significantly reducing the risk of stress cracking common in brittle plastics. The black zinc-plated steel construction provides reliable corrosion protection in industrial environments, while the Phillips drive system ensures secure tool engagement during installation. With its 5/8" length and fully threaded configuration, this fastener maintains consistent clamping force across plastic components in electronics enclosures, automotive trim, consumer products, and industrial equipment assemblies where reliable, long-term fastening performance is essential.

Specification Summary & Compliance

This No. 4-24 x 5/8" DST tapping screw features inch system measurements with Class 2A thread tolerances and 24 threads per inch. The fastener meets ASME B18.6.3 specifications for dimensional accuracy and performance requirements. Manufactured from steel with black zinc plating for corrosion protection, it features a pan head style with Phillips No. 1 drive and is designed for use with No. 44 drill bit (0.086" diameter) in plastic applications. The thread forming (DST) design and right-hand threading provide reliable fastening performance in compliance with industry standards.