S-90385A325 Length 1" ASME B18.6.3 Tapping Screws
Tapping Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior material compatibility – Zinc-plated steel construction provides excellent corrosion resistance for durable fastening in plastic assemblies.
- Precision thread forming design – DST thread forming technology creates strong, reliable threads in plastic without pre-tapping, reducing assembly steps.
- Optimized drive performance – Phillips No. 1 drive ensures secure torque transmission and minimizes cam-out during installation.
- Enhanced material protection – Blunt tip design prevents plastic material splitting or damage during insertion.
- Maximum holding power – Fully threaded 1" length provides complete engagement and superior pull-out resistance.
- Industry-standard compliance – Manufactured to ASME B18.6.3 specifications for consistent quality and reliable performance.
- Simplified installation – Compatible with standard No. 44 drill bit (0.086" diameter) for straightforward hole preparation.
Professional Applications & Engineering Value
This No. 4-24 thread forming tapping screw is specifically engineered for plastic applications where material integrity is paramount. The zinc-plated steel construction offers superior corrosion protection in demanding environments, while the DST thread forming technology eliminates the need for separate tapping operations, significantly reducing assembly time and costs. The blunt tip and rounded pan head profile work in harmony to prevent stress concentration and material cracking in delicate plastic components. With its fully threaded design and Phillips drive, this screw delivers consistent clamping force and reliable performance in electronic enclosures, automotive trim, consumer products, and industrial equipment where plastic-to-plastic or plastic-to-metal fastening is required.
Specification Summary & Compliance
This thread forming tapping screw features a No. 4-24 thread size with Class 2A tolerance, 0.112" thread diameter, and right-hand threading. The screw meets ASME B18.6.3 manufacturing specifications for dimensional accuracy and performance standards. The zinc-plated steel material provides RoHS and REACH compliance for environmental regulations. Compatible with No. 44 drill bit (0.086" diameter) for proper hole preparation in plastic materials.
