S-91255A621 3/8"-16 x 5/8" ASTM F835 Steel Button Head Hex-Drive Screws
Steel 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 corrosion resistance with black-oxide coating, ideal for harsh industrial environments
- Superior tensile strength (120,000 psi) ensures reliable performance in high-stress applications
- Precision Class 3A thread fit provides secure, vibration-resistant fastening with minimal backlash
- Rockwell C39 hardness rating delivers excellent wear resistance and long service life
- Hex drive compatibility (7/32") enables quick installation with standard industrial tools
- Fully threaded design allows for maximum engagement and adjustable positioning
- Comprehensive regulatory compliance meets ASME B18.3, ASTM F835, RoHS 3, and REACH standards
Professional Applications & Engineering Value
These black-oxide alloy steel rounded head screws with 3/8"-16 UNC coarse threading are engineered to address critical industrial fastening challenges. The combination of Class 3A thread fit and fully threaded design ensures maximum engagement in heavy machinery, automotive assemblies, and structural applications where vibration resistance is paramount. The black-oxide surface treatment provides superior corrosion protection in demanding environments, while the hex drive configuration facilitates rapid installation in confined spaces. These industrial-grade rounded head screws deliver reliable performance in applications requiring both high tensile strength (120,000 psi) and consistent thread engagement, making them ideal for manufacturing equipment, construction machinery, and transportation systems where fastener failure is not an option.
Specification Summary & Compliance
This 3/8"-16 UNC screw features precision Class 3A thread fit with coarse thread spacing for optimal engagement. Manufactured to exacting standards including ASME B18.3 and ASTM F835 specifications. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
