S-90385A155 Length 1" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in various industrial environments.
• Effortless installation using a standard No. 2 Phillips drive, reducing assembly time and tool wear.
• Excellent holding power in plastic due to thread-forming (DST) design, which creates strong, secure threads without pre-tapping.
• Reliable, flush seating with a rounded pan head that distributes clamping force evenly and resists cam-out.
• Full-length threading ensures maximum grip along the entire 1" length for consistent fastening strength.
• Precision-engineered dimensions, including a 0.138" thread diameter and 19 threads per inch, for accurate fit and reduced material stress.
• Broad compatibility with a recommended No. 35 drill bit (0.11" diameter), simplifying hole preparation in plastic assemblies.

Professional Applications & Engineering Value

These zinc-plated steel tapping screws are specifically engineered to address common challenges in plastic fastening, such as material cracking and stripped threads. The thread-forming (DST) technology displaces plastic material to create durable, high-strength internal threads, eliminating the need for separate inserts and reducing assembly steps. The Phillips drive and pan head design provide secure torque transmission and a low-profile finish, ideal for applications in electronics enclosures, automotive trim, and consumer products where vibration resistance and a clean appearance are critical. Manufactured from robust steel with a protective zinc coating, these screws ensure long-term reliability in humid or mildly corrosive conditions, making them a trusted choice for industrial and construction projects requiring dependable plastic screws.

Specification Summary & Compliance

This product adheres to precise dimensional standards with a 0.138" thread diameter and 19 threads per inch, ensuring consistent performance. It is manufactured in compliance with ASME B18.6.3 specifications for tapping screws, guaranteeing interchangeability and reliability. Additionally, these screws are RoHS 3 (2015/863/EU) Compliant, confirming they are free from hazardous substances and suitable for use in regulated industries and global markets.