S-90086A660 3/8"-16 x 4" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding industrial environments
• Excellent thread-cutting performance with Type F design that creates precise mating threads in various materials without pre-tapping
• Enhanced driving efficiency through Phillips No. 4 drive system that minimizes cam-out and ensures secure installation
• Optimal material engagement with fully threaded 4" length providing maximum holding power across the entire fastener
• Perfect flush installation featuring standard flat head with 82° countersink angle for smooth, professional finishes
• Reliable coarse threading with 3/8"-16 UNC specification ensuring quick installation and strong vibration resistance
• Versatile material compatibility specifically engineered for aluminum, brass, cast iron, and sheet metal applications

Professional Applications & Engineering Value

These heavy-duty tapping screws deliver exceptional engineering value by solving common fastening challenges in metal fabrication and industrial assembly. The zinc-plated steel construction provides essential corrosion protection while maintaining high tensile strength for demanding applications. The Type F thread cutting design eliminates the need for separate tapping operations, significantly reducing installation time and labor costs in aluminum, brass, cast iron, and sheet metal components. The fully threaded configuration ensures uniform stress distribution along the entire 4" length, preventing material distortion and providing superior pull-out resistance. The 82° countersink angle and flat head profile create seamless finishes that meet professional appearance standards while the Phillips No. 4 drive enables efficient installation without specialized tools.

Specification Summary & Compliance

These 3/8"-16 UNC tapping screws feature coarse threading with standard Class 2A tolerance for reliable engagement. Manufactured to precise dimensional requirements with 0.375" thread diameter and 4" overall length. The product meets ASME B18.6.3 specifications (SAE J933) for quality assurance and is RoHS 3 (2015/863/EU) Compliant for environmental safety. Recommended drill bit size: T (0.358" diameter) for optimal thread engagement in specified materials.