S-90941A112 4-40 x 3/8" ASME B18.3 Titanium Button Head Hex-Drive Screws
Titanium Button Head Hex-Drive 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
- Exceptional strength-to-weight ratio from Grade 5 Titanium construction, providing 130,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance inherent to titanium material, ensuring long-term durability in harsh industrial environments
- Precise torque transmission through the 1/16" hex drive design, enabling secure installation and preventing tool slippage
- Optimized thread engagement with 4-40 UNC coarse threading and Class 2A fit, ensuring smooth installation and vibration resistance
- Space-saving rounded button head profile that provides a low-profile finish while maintaining structural integrity
- Full threading along the 3/8" length for maximum grip strength and uniform stress distribution across fastened components
- Certified material hardness at Rockwell C36, delivering excellent wear resistance and thread durability
Professional Applications & Engineering Value
These Grade 5 Titanium Rounded Head Screws with 4-40 UNC coarse threading solve critical engineering challenges in weight-sensitive applications where corrosion resistance and high strength are paramount. The titanium construction provides exceptional performance in aerospace, medical equipment, and marine environments where stainless steel alternatives would fail due to galvanic corrosion or weight constraints. The fully threaded design ensures maximum load distribution, while the 1/16" hex drive enables precise torque application in confined spaces. These button head screws maintain a low-profile appearance without compromising the 130,000 psi tensile strength needed for structural applications, making them ideal for precision assemblies requiring both aesthetic appeal and mechanical reliability.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 standards with Class 2A thread fit tolerance for consistent performance. The 4-40 UNC coarse thread specification ensures compatibility with standard components while the Rockwell C36 hardness rating guarantees long-term thread integrity. These fasteners are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications with strict material restrictions.
