S-90385A338 Length 1 3/4" 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 industrial environments.
• Enhanced holding power in plastic materials due to thread forming DST design and full threading, reducing the risk of loosening under vibration.
• Efficient and secure installation with Phillips No. 2 drive and pan head design, allowing for easy torque application and minimizing driver slippage.
• Precise thread engagement with 19 TPI and blunt tip, enabling clean thread formation in plastics without pre-tapping.
• Reliable dimensional accuracy with 0.138" thread diameter and 1-3/4" length, ensuring consistent fit and reducing assembly errors.
• Broad compatibility for use with No. 35 drill bit (0.11" diameter), streamlining the fastening process in plastic assembly applications.
• Compliance with industry standards per ASME B18.6.3, guaranteeing quality and interchangeability for professional use.

Professional Applications & Engineering Value

These zinc-plated steel tapping screws are engineered to address common challenges in plastic fastening applications, such as material cracking and thread stripping. The thread forming DST design with a blunt tip creates strong, permanent threads in plastics without requiring pre-drilled threads, reducing installation time and tooling costs. The Phillips pan head and No. 2 drive size provide excellent torque transfer, minimizing cam-out and ensuring secure fastening in automated or manual assembly lines. Ideal for industries like electronics, automotive, and consumer goods, these screws offer high durability and consistent performance, supported by full threading for maximum grip in brittle or soft plastic materials.

Specification Summary & Compliance

This product features precise dimensions including a thread diameter of 0.138", head diameter of 0.254", and length of 1-3/4", with fully threaded right-hand threads and 19 TPI for accurate fit. Manufactured to ASME B18.6.3 specifications, it ensures reliable performance and interchangeability. The screws comply with common industry standards for dimensional tolerance and are made from zinc-plated steel for corrosion resistance, suitable for use in various plastic assembly environments without additional certifications like RoHS or REACH specified.