S-90086A144 6-32 x 1/4" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior thread-cutting performance in aluminum, brass, cast iron, and sheet metal without pre-tapping, reducing installation time and labor costs.
• Enhanced corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in various industrial environments.
• Optimized drive engagement with Phillips #2 drive for efficient torque transfer and reduced risk of cam-out during high-speed assembly.
• Secure flush mounting thanks to the 82° undercut flat head design, minimizing protrusion and improving aesthetic finish in precision applications.
• Reliable coarse thread (UNC) grip with full threading and right-hand direction, providing strong holding power in soft materials and vibration-prone settings.
• Industry-standard compliance with ASME B18.6.3 and RoHS 3, ensuring consistent quality, safety, and environmental responsibility for global supply chains.
• Precision-engineered dimensions including 1/4" length and No. 6 screw size, enabling seamless integration with standard drill bit size #31 for accurate pilot holes.

Professional Applications & Engineering Value

These 6-32 UNC tapping screws are engineered to address common fastening challenges in metalworking and assembly lines. The zinc-plated steel material offers a durable barrier against oxidation, while the thread-cutting design (Type F) and coarse spacing enable self-tapping in aluminum, brass, cast iron, and sheet metal without stripping threads. The undercut flat head with an 82° countersink angle ensures a flush fit, reducing snagging risks in automated equipment and electrical enclosures. By combining Phillips #2 drive efficiency with full threading, these screws minimize installation effort and enhance joint integrity in HVAC, automotive, and machinery applications where vibration resistance and rapid deployment are critical.

Specification Summary & Compliance

This product adheres to UNC thread standards with coarse spacing and right-hand direction, ensuring compatibility with inch-system components. Manufacturing follows ASME B18.6.3 specifications (referencing SAE J933) for dimensional accuracy, including head diameter (0.262"), length (1/4"), and thread size (6-32). The screws are fully threaded and designed for use with a No. 31 drill bit (0.12" diameter). Compliance with RoHS 3 (2015/863/EU) confirms the absence of restricted hazardous substances, supporting sustainable procurement practices.