S-90086A608 4-40 x 3/8" 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 thread cutting performance in aluminum, brass, cast iron, and sheet metal without pre-tapped holes
- Enhanced corrosion resistance with zinc-plated steel construction for extended service life in industrial environments
- Maximum holding power through fully threaded design that maintains consistent grip along the entire fastener length
- Easy installation and removal with Phillips No. 1 drive that provides reliable torque transfer and reduces cam-out
- Flush surface finish with standard flat head design that sits neatly in countersunk applications
- Reliable coarse threading with UNC 4-40 specification that ensures strong engagement in various materials
- Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and performance
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel tapping screws deliver exceptional engineering value through their specialized thread cutting Type F design, which eliminates the need for separate tapping operations in production environments. The coarse thread pattern combined with the thread cutting capability provides superior pull-out resistance in softer materials like aluminum and brass, while the zinc-plated steel construction ensures durability against environmental factors in industrial settings. The flat head profile with 82° countersink angle creates seamless surface finishes in assembly applications, making these self-tapping screws ideal for manufacturing equipment, electrical enclosures, and metal fabrication where reliable fastening in sheet metal, cast iron, and non-ferrous metals is critical to structural integrity.
Specification Summary & Compliance
These tapping screws feature 4-40 UNC coarse threads with standard Class 2A tolerances, fully threaded shank design, and 3/8" length for consistent performance. Manufactured to meet ASME B18.6.3 specifications (SAE J933) for dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) Compliant for environmental safety and contains no restricted hazardous substances, ensuring compliance with international regulatory standards for industrial components.
