S-90200A420 1/2"-13 x 3/4" 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 manual grip and torque application with a fully knurled, high-profile round head design for secure handling without tools.
- Superior corrosion resistance and durability thanks to the black-oxide steel finish, extending service life in harsh industrial environments.
- Reliable fastening in high-stress applications with a tensile strength of 70,000 psi and Rockwell B84 hardness for robust performance.
- Quick and easy coarse thread engagement using 1/2"-13 UNC threads, ideal for rapid assembly and disassembly in maintenance tasks.
- Precise thread fit and interchangeability ensured by Class 2A thread standards, reducing the risk of cross-threading and improving installation reliability.
- Full-length threading for versatile positioning along the 3/4" length, allowing flexible adjustment in various mounting scenarios.
- Compliance with global environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries.
Professional Applications & Engineering Value
This black-oxide steel thumb screw is engineered to address common challenges in industrial settings, such as the need for tool-free adjustments and resistance to wear. The knurled round head provides an ergonomic grip that minimizes slippage, while the coarse UNC thread enables fast installation in equipment panels, machinery guards, and electronic enclosures. Made from high-strength steel with a Rockwell B84 hardness, it withstands repeated use without deformation, making it ideal for applications in manufacturing, automotive, and aerospace where manual operation and durability are critical. The fully threaded design ensures consistent holding power, solving issues of loose fittings in dynamic environments.
Specification Summary & Compliance
This thumb screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy and easy assembly. It meets RoHS 3 (2015/863/EU) compliance with exemption 6(a)-I for lead as an alloying element in steel and is REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence for industrial use.
