S-91715A164 1/4"-20 x 3/4" ASME B18.6.3, SAE J933 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 corrosion resistance with black zinc plating, extending service life in demanding industrial environments
- Effortless installation through self-tapping thread cutting design that eliminates separate tapping operations
- Wide material compatibility for reliable performance in aluminum, brass, cast iron, and sheet metal applications
- Optimized drive engagement with Phillips No. 3 drive providing secure torque transmission and reduced cam-out risk
- Enhanced thread engagement through UNC coarse threads ensuring rapid assembly and vibration resistance
- Full-length threading maximizing grip strength and load distribution across the entire fastener length
- Precision manufacturing meeting ASME B18.6.3 standards for consistent quality and dimensional accuracy
Professional Applications & Engineering Value
These black zinc-plated steel tapping screws deliver exceptional engineering value in metal fabrication and assembly operations. The Type F thread cutting design with blunt tip and UNC coarse threads creates precise mating threads in ductile materials without pre-tapped holes, significantly reducing installation time and labor costs. The pan head configuration with Phillips No. 3 drive provides reliable fastening in confined spaces while the fully threaded shank ensures maximum holding power in aluminum, brass, cast iron, and sheet metal applications. This combination addresses critical industrial pain points including assembly efficiency, material compatibility, and long-term fastener reliability in demanding environments.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications (SAE J933) with UNC thread form and Class 2A tolerance for precision fit. The screws feature 1/4"-20 coarse thread configuration, 3/4" length, and require No. 1 drill bit (0.228" diameter) for proper installation. Compliant with RoHS 3 (2015/863/EU) environmental standards, ensuring safe use in regulated industries and international markets.
