S-91715A172 1/4"-20 x 2" 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-plated steel construction, extending service life in demanding industrial environments
- Self-tapping efficiency with Type F thread cutting design eliminates need for pre-tapped holes in aluminum, brass, cast iron, and sheet metal
- High-strength fastening through UNC coarse threads providing excellent pull-out resistance and vibration resistance
- Quick installation with No. 3 Phillips drive ensuring secure tool engagement and reduced cam-out during high-torque applications
- Full-thread engagement along the entire 2" length maximizes grip strength and distributes load evenly
- Precision compatibility with standard No. 1 drill bits (0.228") for optimal hole preparation and thread formation
- Regulatory compliance meeting ASME B18.6.3 manufacturing standards and RoHS 3 environmental directives
Professional Applications & Engineering Value
These 1/4-20 UNC thread cutting tapping screws deliver exceptional engineering value in metal fabrication and assembly operations. The black zinc-plated steel construction provides superior corrosion protection while the Type F thread cutting design creates precise mating threads in aluminum, brass, cast iron, and sheet metal substrates without requiring pre-tapped holes. The coarse UNC thread pattern ensures rapid installation and excellent holding power in soft metals, while the fully threaded configuration maximizes surface contact for enhanced load distribution. The No. 3 Phillips drive maintains positive tool engagement during high-torque applications, reducing installation time and improving worker efficiency in industrial assembly lines, construction projects, and metalworking applications.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with UNC coarse threads (1/4"-20) and standard dimensional tolerances. Features Type F thread cutting design compatible with No. 1 drill bits (0.228" diameter). Fully compliant with RoHS 3 (2015/863/EU) environmental directives and manufactured using black zinc-plated steel for enhanced corrosion resistance. Right-hand thread direction with blunt tip and pan head configuration for universal industrial applications.
