S-91715A101 4-40 x 1/4" 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-plated steel construction for extended service life in demanding industrial environments
- Excellent thread-forming capability with Type F thread cutting design creates precise, secure threads in various materials without pre-tapping
- Enhanced driving efficiency through Phillips No. 1 drive system prevents cam-out and ensures reliable installation torque transfer
- Versatile material compatibility specifically engineered for aluminum, brass, cast iron, and sheet metal applications
- Optimized pan head design provides a low-profile, rounded head that sits flush while distributing clamping force evenly
- Full threading along 1/4" length ensures maximum grip and holding power throughout the entire fastener engagement
- Coarse UNC 4-40 thread pattern delivers faster installation and superior resistance to vibration loosening
Professional Applications & Engineering Value
These 4-40 UNC thread cutting tapping screws deliver exceptional engineering value by solving critical fastening challenges in metalworking and industrial assembly. The Type F thread cutting design eliminates the need for separate tapping operations, significantly reducing installation time and labor costs while creating precise, durable threads in aluminum, brass, cast iron, and sheet metal substrates. The black zinc-plated steel construction provides reliable corrosion protection, extending service life in demanding environments. With their fully threaded coarse UNC pattern and Phillips No. 1 drive, these screws ensure rapid installation, maximum thread engagement, and secure fastening performance that withstands vibration and mechanical stress in industrial construction and manufacturing applications.
Specification Summary & Compliance
These precision-engineered tapping screws feature 4-40 UNC coarse threads with standard Class 2A tolerances and fully threaded 1/4" length design. Manufactured to meet ASME B18.6.3 specifications (SAE J933) for dimensional accuracy and performance reliability. The product is RoHS 3 (2015/863/EU) Compliant, ensuring environmental regulatory compliance for industrial use across global markets.
