S-93005A585 5/16"-18 x 3" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Effortless manual operation with a large four-arm thumb head (1 1/2" width) for superior grip and tightening without tools.
- Enhanced corrosion resistance from the black-oxide steel finish, extending service life in demanding industrial environments.
- Reliable high-strength performance with a tensile strength of 180,000 psi and Rockwell C40 hardness for heavy-duty applications.
- Quick and secure fastening due to the 5/16"-18 UNC coarse thread and Class 2A fit, ensuring consistent engagement and vibration resistance.
- Full-length threading (3" length) provides maximum adjustability and holding power along the entire shank.
- Extended tip design (5/32" length) facilitates easier alignment and initial engagement in pre-tapped holes or nuts.
- Compliance with stringent environmental standards (RoHS 3 and REACH) ensures safety and regulatory acceptance for global supply chains.
Professional Applications & Engineering Value
This black-oxide steel thumb screw is engineered to solve common industrial challenges where tool-free, high-strength fastening is critical. The four-arm head design offers exceptional leverage for manual operation, reducing assembly time in equipment maintenance, electronic enclosures, and machinery panels. The coarse UNC threading and Class 2A fit provide reliable performance in high-vibration settings, preventing loosening while the extended tip ensures quick alignment. Made from hardened steel with a corrosion-resistant finish, it withstands harsh conditions in manufacturing, automotive, and outdoor applications, delivering long-term durability and reduced replacement costs.
Specification Summary & Compliance
This thumb screw adheres to UNC thread standards with a Class 2A fit for precise dimensional tolerance. It is manufactured from high-strength steel, achieving a tensile strength of 180,000 psi and Rockwell C40 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it meets global safety and sustainability requirements for industrial components.
