S-90627A113 Length 3/8" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black zinc-plated steel construction for extended service life in demanding environments
• Excellent thread-forming capability creates strong, permanent threads in plastic materials without pre-tapping
• Maximum holding power achieved through fully threaded design that distributes load evenly across the entire fastener length
• Quick and secure installation with Phillips No. 1 drive that prevents cam-out and ensures consistent torque application
• Optimized plastic compatibility with blunt tip design that minimizes material stress and prevents cracking during installation
• Precise fit and reliable performance guaranteed by ASME B18.6.3 compliance and No. 44 drill bit compatibility
• Versatile pan head design provides a low-profile finish with good bearing surface for various plastic applications

Professional Applications & Engineering Value

These thread forming tapping screws are specifically engineered to address common challenges in plastic fastening applications, where traditional fasteners often cause material stress, cracking, or stripping. The black zinc-plated steel construction provides essential corrosion protection while maintaining the strength required for industrial environments. The DST thread forming design creates precise mating threads in plastic substrates without removing material, resulting in superior pull-out resistance and vibration resistance. This makes them ideal for plastic assembly in automotive components, electrical enclosures, and consumer products where reliable, permanent fastening is critical. The combination of fully threaded design and 24 TPI thread pitch ensures maximum engagement in various plastic densities, from soft thermoplastics to reinforced composites.

Specification Summary & Compliance

This No. 4-24 x 3/8" tapping screw features standard Class 2A thread tolerances with right-hand threading and meets ASME B18.6.3 specifications for dimensional accuracy and performance. The fastener is designed for use with No. 44 drill bit (0.086" diameter) for precise hole preparation. Manufacturing follows industry standards for thread forming screws with pan head style and Phillips No. 1 drive system. Compliant with RoHS and REACH environmental regulations for industrial use.