S-90385A336 Length 1 1/4" 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 various environments.
• Excellent holding power in plastic materials due to the thread-forming DST design, which creates strong, secure fastenings without pre-tapping.
• Efficient installation and reduced tool wear with a Phillips drive style and No. 2 drive size, allowing for quick, straightforward assembly.
• Reliable, fully threaded engagement providing consistent grip along the entire 1-1/4" length for enhanced stability in plastic applications.
• Optimized thread design featuring 19 TPI and a blunt tip to minimize material stress and prevent cracking in plastic components.
• Broad compatibility with standard No. 35 drill bits, simplifying hole preparation and reducing installation time.
• Assured quality and durability by meeting ASME B18.6.3 specifications, ensuring consistent performance for industrial and construction uses.

Professional Applications & Engineering Value

These No. 6 tapping screws are specifically engineered for plastic applications, where traditional fasteners may cause splitting or weak holds. The zinc-plated steel material offers robust corrosion resistance, ideal for both indoor and outdoor settings. With a thread-forming DST design and fully threaded shank, these screws displace plastic material to form secure internal threads, eliminating the need for separate tapping and reducing assembly steps. The Phillips pan head provides a low-profile, flush finish, while the blunt tip and precise 19 TPI minimize stress concentration, preventing cracks in brittle plastics. Commonly used in industrial assembly, electronics enclosures, and construction fixtures, these screws deliver reliable, vibration-resistant fastening that meets rigorous ASME B18.6.3 standards for performance and safety.

Specification Summary & Compliance

This product adheres to ASME B18.6.3 specifications, ensuring dimensional accuracy and reliability. Key details include a thread diameter of 0.138", length of 1-1/4", and fully threaded right-hand threads with 19 TPI. The screws are designed for use with a No. 35 drill bit (0.11" diameter) and feature a standard pan head profile. Compliance with industry standards guarantees consistent quality for plastic fastening applications, supporting efficient and durable assembly processes.