S-90165A520 3/8"-16 x 4 5/16" 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 hand-tightening with a large four-arm thumb head design requiring no tools for quick adjustments
- Superior corrosion resistance from the black-oxide steel finish, extending service life in demanding environments
- High mechanical strength with 180,000 psi tensile strength and Rockwell C40 hardness for reliable, heavy-duty fastening
- Secure and adaptable clamping thanks to the removable swivel tip that self-aligns up to 10° on uneven surfaces
- Fast and easy coarse threading with UNC Class 2A fit, ensuring quick installation and robust engagement
- Full-length threading provides maximum grip and adjustability along the entire 4 5/16" length
- Compliance with global standards including RoHS 3 and REACH for safe use in regulated industries
Professional Applications & Engineering Value
This black-oxide steel thumb screw is engineered to solve common industrial fastening challenges where tool-less operation and high strength are critical. The four-arm head design offers excellent grip for manual tightening in confined spaces or on frequently adjusted equipment. Its removable swivel tip with a 10° maximum angle prevents damage to sensitive surfaces and ensures even pressure distribution, making it ideal for securing panels, fixtures, and machinery components without marring. The fully threaded UNC coarse thread and Class 2A fit enable rapid assembly and disassembly, reducing downtime in production and maintenance settings. With a robust 180,000 psi tensile strength, it reliably handles high-stress applications in automotive, electronics, and industrial machinery, providing long-term durability and performance.
Specification Summary & Compliance
This thumb screw adheres to UNC coarse thread standards with a precise Class 2A thread fit for consistent performance. It is manufactured from black-oxide steel and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory acceptance in global markets.
