S-90096A439 1/4"-20 x 1 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 zinc-plated steel construction for extended service life in demanding industrial environments
- Efficient self-tapping installation through Type F thread cutting design that eliminates the need for pre-tapped holes
- Enhanced vibration resistance with serrated locking flange that maintains secure fastening under dynamic loads
- High-torque installation capability with external hex drive design allowing for powerful driving force application
- Versatile material compatibility specifically engineered for aluminum, brass, cast iron, and sheet metal applications
- Optimized thread engagement with UNC coarse spacing providing rapid installation and strong holding power
- Full-length threading ensures maximum thread contact and superior load distribution along the entire fastener length
Professional Applications & Engineering Value
These zinc-plated steel tapping screws deliver exceptional engineering value in metal fabrication and assembly operations. The Type F thread cutting design with UNC coarse spacing enables direct installation into aluminum, brass, cast iron, and sheet metal without pre-tapping, significantly reducing assembly time and labor costs. The serrated locking flange provides reliable vibration resistance critical for automotive, machinery, and structural applications where loosening under dynamic loads poses safety risks. The external hex drive accommodates high-torque installation tools, ensuring proper seating and maximum clamping force. With a recommended No. 2 drill bit size (0.221" diameter), these fasteners offer precise fitment for professional-grade installations across industrial manufacturing sectors.
Specification Summary & Compliance
This 1/4"-20 UNC coarse thread tapping screw features Class 2A thread tolerances and fully threaded construction with a length of 1-1/2". Manufactured to meet ASME B18.6.3 specifications (SAE J933) for dimensional accuracy and performance standards. The product is RoHS 3 (2015/863/EU) compliant, ensuring environmental responsibility and regulatory adherence for global industrial applications.
