S-90200A552 1/4"-20 x 2 1/2" 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 manual operation with knurled head texture for superior grip and slip resistance during hand tightening
- Durable corrosion protection from the black-oxide steel finish, extending service life in various industrial environments
- High-strength performance with 70,000 psi tensile strength and Rockwell B84 hardness for reliable load-bearing capability
- Quick and easy installation facilitated by the low-profile round head and fully threaded 2 1/2" length for maximum engagement
- Precise thread compatibility with UNC coarse 1/4"-20 Class 2A threads ensuring secure fits and reduced cross-threading risk
- Broad regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
- Optimized ergonomic design featuring an 11/16" diameter head for comfortable hand adjustment without tools
Professional Applications & Engineering Value
This black-oxide steel thumb screw delivers exceptional value in applications requiring frequent manual adjustments, such as access panels, machinery guards, and electronic enclosures. The knurled head texture provides positive grip even with oily hands or gloves, reducing installation time and improving operator safety. Engineered with UNC coarse threads and Class 2A fit, it ensures rapid assembly and reliable performance in vibration-prone environments. The low-profile design maintains a compact footprint while the fully threaded 2 1/2" length offers versatile mounting depth compatibility. Ideal for maintenance-heavy industrial settings, this thumb screw combines the durability of 70,000 psi tensile strength steel with the convenience of tool-free operation.
Specification Summary & Compliance
This thumb screw features 1/4"-20 UNC coarse threads manufactured to Class 2A dimensional tolerances for consistent fit and performance. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a)-I and REACH (EC 1907/2006) regulations, ensuring adherence to international environmental and safety standards for industrial components.
