S-91306A299 1/2"-13 x 1 3/4" 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 zinc plating, ideal for harsh industrial environments and outdoor applications.
- Superior tensile strength of 120,000 PSI ensures reliable, high-load fastening for demanding mechanical assemblies.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant connections in critical equipment.
- Rockwell C39 hardness rating enhances durability and wear resistance, extending the screw's service life under stress.
- Coarse UNC threading allows for quicker installation and reduced cross-threading risks in coarse materials.
- Hex drive design (5/16") offers high torque application capability and ease of use with standard tools.
- Fully threaded shank ensures maximum grip and holding power along the entire length for uniform load distribution.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this zinc-plated alloy steel rounded head screw addresses common challenges like corrosion, vibration loosening, and high-stress fatigue. The 1/2"-13 UNC coarse thread and Class 3A fit provide excellent engagement in metals and composites, reducing the risk of stripping in coarse-spaced materials. With a 120,000 PSI tensile strength and Rockwell C39 hardness, it withstands dynamic loads in machinery, construction, and automotive assemblies. The hex drive ensures efficient installation, while the rounded button head offers a low-profile finish for safety and aesthetics. Ideal for securing structural components, this screw delivers long-term reliability in corrosive or high-vibration environments.
Specification Summary & Compliance
This screw features a 1/2"-13 UNC thread with Class 3A fit for precision threading and coarse spacing. It complies with ASME B18.3 and ASTM F835 standards, ensuring consistent quality and performance. Environmental and safety regulations are met with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting sustainable manufacturing practices.
