S-90079A636 3/8"-16 x 4" 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
- Superior grip and torque application with a 1 1/4" knurled head for easy manual tightening without tools
- Enhanced durability and corrosion resistance thanks to black-oxide steel construction
- Reliable fastening in demanding environments with 70,000 psi tensile strength and Rockwell B84 hardness
- Quick installation and secure fit using 3/8"-16 UNC coarse threads and Class 2A thread fit
- Versatile partial threading design for precise engagement in various assembly applications
- Extended tip for easier alignment during placement, reducing assembly time
- Compliance with industry regulations including RoHS 3 and REACH for safe industrial use
Professional Applications & Engineering Value
This black-oxide steel thumb screw is engineered to address common industrial challenges such as tool-free adjustments and high-stress applications. The knurled head provides exceptional grip, enabling maximum torque application by hand, which is ideal for machinery covers, electronic enclosures, and prototyping setups where frequent access is required. Its 3/8"-16 UNC coarse threads and Class 2A thread fit ensure quick, secure fastening with reduced cross-threading risks. The partially threaded design with an extended tip facilitates easy alignment, speeding up assembly in manufacturing and maintenance tasks. Made from robust steel with a black-oxide finish, it resists corrosion and wear, delivering long-lasting performance in harsh conditions while meeting RoHS 3 and REACH standards for environmental safety.
Specification Summary & Compliance
This thumb screw features a 3/8"-16 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy, ensuring reliable performance in industrial assemblies. It is manufactured from black-oxide steel with a tensile strength of 70,000 psi and Rockwell B84 hardness. The product complies with RoHS 3 (2015/863/EU) under exemption 6(a)-I for lead as an alloying element in steel and is REACH (EC 1907/2006) compliant, meeting essential regulatory requirements for safe use in various sectors.
