S-90086A658 3/8"-16 x 2 1/2" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior material durability with zinc-plated steel construction providing excellent corrosion resistance for long-lasting performance in demanding industrial environments.
• Enhanced thread engagement through Type F thread cutting design that creates strong, permanent threads in various materials without pre-tapping requirements.
• Optimized drive efficiency with Phillips No. 4 drive style ensuring secure tool engagement and reduced cam-out during installation.
• Versatile material compatibility specifically engineered for aluminum, brass, cast iron, and sheet metal applications across multiple industries.
• Maximum holding power achieved through fully threaded 2-1/2" length and coarse UNC thread pattern for superior pull-out resistance.
• Flush installation capability with standard flat head profile and 82° countersink angle for smooth, professional finishes.
• Reliable compliance assurance meeting ASME B18.6.3/SAE J933 standards and RoHS 3 regulations for quality and environmental safety.

Professional Applications & Engineering Value

These 3/8"-16 UNC thread cutting screws deliver exceptional engineering value by solving critical fastening challenges in aluminum, brass, cast iron, and sheet metal assemblies. The Type F thread cutting design eliminates the need for separate tapping operations, significantly reducing installation time and labor costs while creating strong, permanent threads that resist vibration loosening. The zinc-plated steel construction provides essential corrosion protection for industrial environments, while the Phillips flat head configuration with 82° countersink ensures flush mounting in precision applications. These heavy-duty tapping screws are engineered to maintain thread integrity under stress, making them ideal for automotive, manufacturing, and construction applications where reliable fastening is critical to structural performance and safety.

Specification Summary & Compliance

These screws feature 3/8"-16 UNC coarse threads with standard Class 2A tolerance, fully threaded 2-1/2" length, and 0.717" head diameter with standard flat head profile. Manufacturing complies with ASME B18.6.3 specifications and SAE J933 standards for dimensional accuracy and performance. The products are RoHS 3 (2015/863/EU) Compliant, ensuring environmental regulatory compliance for international industrial applications.