S-90017A597 5/16"-18 x 2" 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 corrosion resistance with black-oxide steel coating, ideal for industrial environments where moisture and contaminants are present.
- High tensile strength of 70,000 psi ensures reliable fastening under heavy loads and mechanical stress.
- Easy manual installation and adjustment thanks to the rectangular thumb head design, eliminating the need for tools in many applications.
- Secure thread engagement with UNC coarse threading and Class 2A fit, providing consistent performance and reducing cross-threading risks.
- Durable material hardness (Rockwell B84) offers excellent wear resistance, extending the screw's service life in demanding conditions.
- Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global industry standards for hazardous substances.
- Versatile partial threading allows for precise clamping force control in assemblies requiring adjustable positioning.
Professional Applications & Engineering Value
This black-oxide steel thumb screw is engineered to address common industrial challenges such as frequent adjustments and exposure to harsh conditions. The rectangular head provides ample grip for manual tightening, reducing downtime in maintenance and assembly lines. With a UNC coarse thread and Class 2A fit, it ensures quick, reliable fastening in machinery, electrical enclosures, and jig fixtures, minimizing the risk of stripping. The black-oxide finish enhances corrosion resistance, making it suitable for outdoor or humid environments. Its 70,000 psi tensile strength and Rockwell B84 hardness deliver long-term durability, supporting heavy-duty applications where vibration and load fluctuations are concerns.
Specification Summary & Compliance
This thumb screw features precise Class 2A thread fit and adheres to UNC coarse thread standards for consistent performance. It is manufactured to meet RoHS 3 (2015/863/EU) with exemption 6(a)-I and REACH (EC 1907/2006) compliance, ensuring it is free from restricted hazardous substances. Dimensions include a 5/16"-18 thread size and 2" length with partial threading, providing reliable fastening in various industrial setups.
