S-90181A544 1/4"-20 x 1 1/4" 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 tightening efficiency with spade head design requiring no tools for quick adjustments
- Superior load-bearing capability from 40,000 psi tensile strength steel construction
- Extended service life through Rockwell B55 hardness resisting wear in high-frequency applications
- Reliable thread engagement with UNC coarse threading preventing cross-threading during installation
- Precision fit assurance via Class 2A thread tolerance maintaining consistent fastening performance
- Full-length fastening versatility with completely threaded 1¼" shank for adjustable grip depth
- Environmentally responsible manufacturing through full compliance with RoHS 3 (2015/863/EU) regulations
Professional Applications & Engineering Value
Engineered for industrial equipment maintenance and access panel security, this steel thumb screw delivers exceptional value in applications requiring frequent access or adjustments. The spade head design enables rapid hand-tightening without tools, significantly reducing downtime during service operations. The UNC coarse threading provides superior resistance to vibration loosening while the fully threaded configuration allows for variable clamping pressures. With 40,000 psi tensile strength and Rockwell B55 hardness, these thumb screws maintain structural integrity in demanding environments including machinery guards, electronic enclosures, and production jigs where reliable, tool-free fastening is critical.
Specification Summary & Compliance
This 1/4"-20 thumb screw features Class 2A thread fit per UNC standards with right-hand coarse threading and precise dimensional control. Manufacturing adheres to strict quality protocols ensuring consistent 1½" length and 0.25" thread diameter across production batches. The product is fully RoHS 3 (2015/863/EU) compliant, containing no restricted hazardous substances, making it suitable for global industrial distribution and environmentally conscious procurement programs.
