S-90086A670 8-32 x 1/2" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior thread cutting performance for reliable fastening in aluminum, brass, cast iron, and sheet metal without pre-tapped holes.
• Enhanced corrosion resistance with black-oxide steel finish, extending service life in demanding industrial environments.
• Optimized drive efficiency through Phillips No. 2 drive design, reducing cam-out and ensuring secure installation.
• Full threading for maximum grip across the entire 1/2" length, providing consistent holding power in various material thicknesses.
• Precision 82° countersink angle allows flush mounting, improving aesthetics and reducing snag hazards in assembled products.
• Compatibility with standard No. 26 drill bits simplifies installation and reduces preparation time in production workflows.
• Coarse UNC thread spacing enables faster installation and superior resistance to vibration loosening in heavy-duty applications.

Professional Applications & Engineering Value

These 8-32 UNC thread cutting screws deliver exceptional engineering value by solving common fastening challenges in metalworking and manufacturing. The Type F tapping screw design with blunt tip and coarse thread spacing creates precise, durable threads in aluminum, brass, cast iron, and sheet metal substrates without requiring pre-tapped holes. This eliminates tapping operations, reduces assembly time, and minimizes production costs. The black-oxide steel construction provides reliable corrosion protection in industrial environments, while the flat head profile with 82° countersink ensures flush mounting for streamlined assemblies. Engineered for heavy-duty industrial fastening, these screws maintain integrity under vibration and load stress, making them ideal for machinery, enclosures, and structural components where reliability is critical.

Specification Summary & Compliance

These screws feature 8-32 UNC coarse threads with standard Class 2A dimensional tolerances and fully threaded design for consistent performance. Manufacturing complies with ASME B18.6.3 specifications (SAE J933) ensuring dimensional accuracy and mechanical properties. The products are RoHS 3 (2015/863/EU) compliant for environmental safety and suitable for use with No. 26 drill bits (0.147" diameter) as specified for proper hole preparation.