S-90385A322 Length 5/8" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-lasting performance in industrial environments
• Efficient thread forming design creates strong, permanent threads in plastic materials without pre-tapping, reducing assembly time
• Optimized for plastic applications with blunt tip to prevent material splitting and ensure secure engagement
• Reliable Phillips drive system (No. 1 size) provides excellent torque transfer and reduces cam-out during installation
• Full threading along 5/8" length delivers maximum holding power and uniform stress distribution
• Standard pan head profile offers low-profile installation with good bearing surface for secure fastening
• Industry-standard compliance with ASME B18.6.3 specifications ensures consistent quality and interchangeability

Professional Applications & Engineering Value

This No. 4-24 thread forming screw is specifically engineered for plastic assembly applications where traditional fastening methods often cause material failure. The zinc-plated steel construction provides essential corrosion protection while maintaining the strength required for durable plastic connections. As a DST type thread forming screw, it displaces plastic material rather than cutting it, creating stronger threads that resist stripping and pull-out. The fully threaded design ensures maximum engagement throughout the entire 5/8" length, while the blunt tip prevents cracking in brittle plastics. These tapping screws are ideal for electronics enclosures, automotive plastic components, and consumer products where reliable fastening in plastic substrates is critical. The Phillips drive system allows for efficient installation with standard tools, making them perfect for high-volume manufacturing environments.

Specification Summary & Compliance

This thread forming screw features precise No. 4-24 thread specifications with 0.112" diameter and 24 threads per inch in right-hand direction. Manufactured to ASME B18.6.3 standards, it ensures dimensional accuracy and performance reliability. The screw is designed for use with No. 44 drill bit (0.086" diameter) for proper hole preparation in plastic materials. The zinc-plated surface treatment provides corrosion protection while maintaining electrical conductivity. All manufacturing processes comply with industry standards for consistent quality and performance in plastic fastening applications.