S-90385A146 Length 3/8" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior thread forming in plastics – DST thread forming technology creates strong, permanent threads without chips, eliminating debris in sensitive plastic assemblies.
• Enhanced corrosion resistance – Zinc-plated steel construction provides a durable protective barrier, extending screw life in various industrial environments.
li>Optimized torque transfer and driving efficiency – Phillips No. 2 drive design ensures maximum power transmission and reduces the risk of cam-out during installation.
• Secure, full-length fastening – Fully threaded design along the 3/8" length delivers consistent holding power and prevents loosening in plastic materials.
• Streamlined assembly process – Pre-determined No. 35 drill bit (0.11" diameter) pairing ensures precise hole sizing for reliable, repeatable installations.
• Broad industrial compatibility – Pan head style with standard rounded profile offers a versatile, low-profile fit for diverse plastic assembly applications.
• Assured quality and material safety – Compliant with ASME B18.6.3 specifications and RoHS 3, guaranteeing mechanical performance and environmental safety.

Professional Applications & Engineering Value

This No. 6 x 3/8" zinc-plated steel DST thread forming screw is engineered specifically for high-performance plastic assembly applications where reliability is critical. The thread forming (not cutting) action of the DST design cold-forms mating threads in plastic, creating a zero-clearance fit that resists vibration loosening and provides exceptional pull-out strength. The zinc-plated steel material offers excellent corrosion resistance for long-term durability in industrial settings, while the Phillips drive ensures efficient installation with standard tools. Its fully threaded configuration and 19 threads per inch density maximize engagement in plastic substrates, making it ideal for electronics enclosures, automotive trim, and consumer appliance assemblies where secure, permanent fastening is required.

Specification Summary & Compliance

This screw features a No. 6 size with 0.138" thread diameter and 3/8" length, manufactured to precise dimensional standards. The right-hand threads with 19 threads per inch provide consistent engagement, while the pan head with 0.254" diameter offers a balanced bearing surface. It complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties, and meets RoHS 3 (2015/863/EU) compliance requirements for restricted substance control, ensuring suitability for global industrial applications.