S-91306A291 5/16"-24 x 1" 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
- Superior corrosion resistance with zinc-plated alloy steel construction for extended service life in harsh environments
- Exceptional mechanical strength with 120,000 psi tensile strength and Rockwell C39 hardness for heavy-duty applications
- Precision thread engagement with Class 3A UNF fine threads ensuring secure, vibration-resistant connections
- Easy installation and removal with 3/16" hex drive providing positive torque transmission
- Versatile rounded button head design offering a low-profile finish with standard head profile for various assembly requirements
- Full threading along 1" length enables maximum grip range and adjustment flexibility
- Comprehensive regulatory compliance meeting ASME B18.3, ASTM F835, RoHS 3, and REACH standards
Professional Applications & Engineering Value
These zinc-plated alloy steel rounded head screws deliver critical performance advantages in demanding industrial environments. The combination of Class 3A UNF fine threads and fully threaded design ensures superior clamping force distribution and vibration resistance, addressing common loosening issues in machinery and equipment assemblies. The zinc plating provides essential corrosion protection for applications exposed to moisture, chemicals, or outdoor conditions. With their 3/16" hex drive and rounded button head profile, these screws facilitate efficient installation in confined spaces while maintaining a clean, professional appearance. Ideal for precision manufacturing, automotive components, and industrial machinery where high tensile strength and reliable fastening are paramount.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit precision and 5/16"-24 UNF fine threads. Complies with ASME B18.3 and ASTM F835 specifications for dimensional accuracy and performance. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements. The right-hand threaded, fully threaded design ensures consistent performance across industrial applications.
