S-90087A844 4-40 x 3/4" 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 thread cutting performance with Type F design for clean, secure threads in aluminum, brass, cast iron, and sheet metal without pre-tapping
- Enhanced corrosion resistance through zinc-plated steel construction, ensuring longevity in industrial environments
- Efficient installation with Phillips No. 1 drive and coarse UNC threads for quick driving and reduced assembly time
- Reliable grip and uniform pressure distribution thanks to the pan head design with standard rounded profile
- Full-length threading provides consistent holding power along the entire 3/4" length for robust fastening
- Optimized compatibility with No. 41 drill bit (0.096" diameter) for precise hole preparation and minimal material stress
- Compliance with industry standards including ASME B18.6.3 and SAE J933, ensuring consistent quality and interchangeability
Professional Applications & Engineering Value
These 4-40 UNC thread cutting screws are engineered to address common challenges in metalworking and assembly, such as stripping and loose fittings. Made from zinc-plated steel, they resist rust and wear in demanding conditions, while the Type F tapping method and coarse thread spacing enable self-tapping in materials like aluminum, brass, cast iron, and sheet metal without additional tools. The Phillips No. 1 drive and blunt tip design simplify installation, reducing labor costs and improving efficiency in automotive, construction, and industrial equipment applications. By meeting ASME B18.6.3 specifications, these screws deliver reliable performance, minimizing downtime and ensuring secure, long-lasting connections.
Specification Summary & Compliance
This product adheres to UNC coarse thread standards with a 4-40 size and Class 2A fit for precise tolerances. It is manufactured in compliance with ASME B18.6.3 and SAE J933 specifications, ensuring dimensional accuracy and performance reliability. The screws feature a right-hand thread direction, fully threaded shank, and are designed for use with a No. 41 drill bit (0.096" diameter). Materials and processes conform to industry regulations for safety and quality.
