S-90385A357 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 various environments.
• High-strength thread forming using DST technology, providing excellent holding power in plastic materials without pre-tapping.
• Effortless installation with a Phillips No. 2 drive, reducing tool slippage and speeding up assembly processes.
• Reliable fastening in plastics due to the blunt tip and fully threaded design, minimizing material stress and preventing cracking.
• Precise compatibility with a No. 19 drill bit (0.166" diameter), ensuring accurate hole sizing for secure installations.
• Enhanced durability from the pan head style, offering a low profile and increased resistance to stripping during torque application.
• Industry-standard compliance with ASME B18.6.3, guaranteeing consistent quality and interchangeability in professional applications.

Professional Applications & Engineering Value

This No. 12 x 5/8" zinc-plated steel DST thread forming screw is engineered to address common challenges in plastic assembly, such as material cracking and weak thread retention. The thread forming design creates strong, permanent threads in plastics without generating chips, reducing cleanup and improving joint integrity. With a fully threaded shank and 16 TPI pitch, it ensures uniform load distribution and resists loosening under vibration. The zinc plating adds a protective layer against corrosion, making it ideal for industrial environments. Commonly used in automotive, electronics, and consumer goods, this tapping screw delivers reliable performance in plastic applications, enhancing assembly speed and reducing long-term maintenance costs.

Specification Summary & Compliance

This screw adheres to ASME B18.6.3 standards, ensuring precise dimensional accuracy and performance reliability. Key specifications include a thread diameter of 0.216", length of 5/8", and 16 TPI thread pitch with a right-hand direction. The thread forming (DST) tapping method and fully threaded design comply with industrial fastening requirements. It is manufactured from zinc-plated steel for corrosion resistance and meets common industry regulations for quality and safety in fastening applications.