S-90096A108 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 corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in harsh industrial environments.
- Enhanced driving efficiency through the combined external hex/slotted drive, allowing for quick installation with standard tools.
- Strong, secure fastening in various materials including aluminum, brass, cast iron, and sheet metal due to the Type F thread cutting design.
- Increased load distribution and vibration resistance from the integrated flange, reducing the risk of loosening under stress.
- Wide compatibility with UNC coarse threads (4-40 size), providing excellent grip and ease of use in coarse-grained materials.
- Full threading for maximum holding power, ensuring consistent engagement and strength across the entire 3/8" length.
- Compliance with industry standards like ASME B18.6.3 and RoHS 3, guaranteeing quality and environmental safety for professional applications.
Professional Applications & Engineering Value
This 4-40 UNC zinc-plated steel tapping screw is engineered to address common challenges in industrial assembly, such as material fatigue and corrosion. Its thread cutting capability allows for self-tapping in aluminum, brass, cast iron, and sheet metal, eliminating the need for pre-tapped holes and reducing installation time. The flanged hex head design provides a larger bearing surface, distributing clamp load evenly to prevent surface damage and improve joint integrity. Made from durable zinc-plated steel, it resists rust and wear, making it ideal for heavy-duty fasteners in machinery, automotive, and construction sectors where reliability is critical.
Specification Summary & Compliance
This screw adheres to UNC coarse thread standards with a size of 4-40 and full threading for precise fit. It meets ASME B18.6.3 specifications (referencing SAE J933) for dimensional accuracy and performance, and is RoHS 3 (2015/863/EU) compliant, ensuring it is free from hazardous substances. Designed for use with a No. 41 drill bit (0.096" diameter), it guarantees optimal hole preparation and secure fastening in industrial applications.
