S-90385A344 Length 7/8" 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 demanding environments
• Excellent thread-forming capability with DST design that creates strong, permanent threads in plastic materials without pre-drilling
• Enhanced driving efficiency through Phillips No. 2 drive system, reducing cam-out and improving installation speed
• Optimal load distribution thanks to the pan head design that provides a larger bearing surface for secure fastening
• Maximum holding power with fully threaded 18 TPI configuration that ensures complete engagement throughout the material
• Reliable dimensional accuracy meeting ASME B18.6.3 specifications for consistent performance and interchangeability
• Versatile plastic applications specifically engineered for plastic materials with 0.164" thread diameter and 7/8" length

Professional Applications & Engineering Value

These zinc-plated steel tapping screws are specifically engineered to address common challenges in plastic assembly applications. The thread-forming DST design eliminates the need for separate tapping operations, reducing assembly time and labor costs while creating strong, permanent threads that resist stripping and pull-out. The Phillips drive system ensures quick installation with reduced tool slippage, while the pan head configuration provides excellent clamping force distribution across plastic surfaces. Ideal for industrial construction and manufacturing environments, these self-tapping screws deliver reliable performance in various plastic materials, from enclosures and housings to structural components, ensuring vibration resistance and long-term fastening integrity without material damage.

Specification Summary & Compliance

This No. 8 x 7/8" tapping screw features precise dimensional specifications including 0.164" thread diameter, 18 TPI fully threaded design, and standard inch measurements. The product strictly complies with ASME B18.6.3 standards for dimensional accuracy and performance requirements. Manufactured from zinc-plated steel with right-hand threading and blunt tip configuration, these fasteners are designed for use with No. 30 drill bits (0.1285" diameter) in plastic applications, ensuring proper fit and optimal thread formation according to industry specifications.