S-90200A545 1/4"-20 x 1/2" Thumb Screws
Thumb Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Enhanced manual operation with knurled texture and round low-profile head for superior grip without tools
- High durability in demanding environments due to black-oxide steel construction offering corrosion resistance
- Reliable fastening strength with 70,000 psi tensile strength and Rockwell B84 hardness for load-bearing applications
- Easy installation and compatibility with UNC 1/4"-20 coarse threads and Class 2A fit for standard industrial components
- Secure partial threading for controlled engagement and reduced risk of cross-threading in assemblies
- Compliance with global regulations including RoHS 3 and REACH, ensuring safe use in regulated industries
- Right-hand thread design for intuitive tightening in common mechanical setups
Professional Applications & Engineering Value
This black-oxide steel thumb screw is engineered to address frequent assembly challenges in industrial settings, such as tool-free adjustments and corrosion-prone environments. The low-profile round head with deep knurled texture ensures a firm grip, reducing slippage during manual tightening in confined spaces. Made from robust steel with a Rockwell B84 hardness and 70,000 psi tensile strength, it withstands repetitive use in machinery, electronics enclosures, and automotive fixtures. The 1/4"-20 UNC coarse thread and Class 2A fit provide quick, reliable engagement with standard nuts and tapped holes, minimizing installation time while the partial threading offers precise depth control. Ideal for maintenance panels, access doors, and prototyping, this screw combines ergonomic design with industrial-grade durability.
Specification Summary & Compliance
This thumb screw adheres to UNC thread standards with a Class 2A fit for consistent dimensional accuracy. It meets RoHS 3 (2015/863/EU) compliance under exemption 6(a)-I for lead as an alloying element in steel and is REACH (EC 1907/2006) compliant, ensuring environmental and safety standards for industrial use.
