S-91715A162 1/4"-20 x 1/2" 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
- Effortless self-tapping installation through thread cutting design, eliminating the need for pre-tapped holes and reducing assembly time
- Exceptional material compatibility with aluminum, brass, cast iron, and sheet metal for versatile application across multiple industries
- Optimized drive efficiency with Phillips No. 3 drive style providing secure torque transmission and reduced cam-out risk
- Reliable thread engagement through UNC coarse threading and full threading length, ensuring maximum pull-out resistance
- Precision dimensional compliance with ASME B18.6.3 standards, guaranteeing consistent performance and interchangeability
- Environmental regulation compliance with RoHS 3 standards, making them suitable for regulated industries and global supply chains
Professional Applications & Engineering Value
These thread cutting tapping screws solve critical fastening challenges in metalworking and manufacturing applications. The black zinc-plated steel construction provides enhanced corrosion protection where moisture or chemical exposure is a concern, while the UNC coarse threading and cutting tip design enable direct installation into aluminum, brass, cast iron, and sheet metal without pre-tapping. This eliminates secondary operations and reduces assembly costs. The combination of thread cutting technology with standardized 1/4"-20 thread size ensures reliable performance in HVAC systems, electrical enclosures, automotive components, and industrial machinery where vibration resistance and long-term holding power are essential.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with UNC Class 2A thread tolerances, these screws feature a 1/4"-20 coarse thread configuration, 1/2" length, and pan head design with Phillips No. 3 drive. The product complies with RoHS 3 (2015/863/EU) environmental regulations and is engineered for use with No. 1 drill bit (0.228" diameter) as specified for proper thread cutting installation in various metal substrates.
