S-94567A120 4-40 x 5/16" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Enhanced grip and easy manual operation with a knurled round head and flared collar design, eliminating the need for tools in quick adjustments.
- Superior durability and corrosion resistance thanks to 6061 aluminum construction, ideal for harsh industrial environments.
- High tensile strength of 40,000 psi ensures reliable performance under stress, reducing the risk of fastener failure.
- Precise Class 2A thread fit with UNC coarse threads for smooth engagement and secure fastening in various applications.
- Fully threaded right-hand design allows for consistent holding power along the entire 5/16" length.
- Compliance with RoHS 3 and REACH regulations guarantees environmental safety and meets global industry standards.
- Rockwell B60 hardness provides excellent wear resistance, extending the screw's service life in repetitive use.
Professional Applications & Engineering Value
This 4-40 UNC thumb screw is engineered to address common industrial challenges, such as the need for quick, tool-free assembly and disassembly in equipment maintenance and electronic enclosures. Crafted from 6061 aluminum, it offers a lightweight yet robust solution that resists corrosion, making it suitable for applications in aerospace, automotive, and electronics where weight and durability are critical. The knurled head and flared collar design enhance user grip, reducing slippage and improving efficiency in high-vibration environments. With a coarse thread and Class 2A fit, it ensures rapid installation and reliable performance, minimizing downtime and supporting seamless operations in industrial thumb screw applications.
Specification Summary & Compliance
This thumb screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(b)-II for lead in aluminum alloys and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met. Key specifications include a thread size of 4-40, length of 5/16", and manufacturing that aligns with industrial fastener requirements for reliability and performance.
