S-91306A387 5/16"-18 x 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 tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing failure risks and maintenance costs.
- Superior corrosion resistance with zinc plating protects against rust and extends service life in harsh industrial environments.
- Precise Class 3A thread fit provides secure, vibration-resistant fastening for critical assemblies, minimizing loosening over time.
- Coarse UNC threading enables quick installation and removal, saving labor time in maintenance and production cycles.
- Full threading along the 3/4" length offers maximum grip and adjustability across varied material thicknesses.
- Hex drive design with 3/16" drive size allows for high-torque application using standard tools, enhancing installation efficiency.
- Rounded button head profile combines a low-profile, aesthetic finish with reduced risk of snagging, ideal for exposed applications.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these zinc-plated alloy steel screws address common challenges like vibration-induced loosening and environmental degradation. The Class 3A thread fit and coarse UNC thread form ensure tight tolerances and rapid assembly in machinery, automotive, and construction sectors, where high tensile strength and durability are paramount. The fully threaded design provides consistent clamping force, while the rounded head and hex drive facilitate secure, flush mounting in tight spaces. This combination of material robustness and precision engineering delivers long-term reliability, reducing downtime and replacement frequency in demanding environments.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for precise dimensional accuracy under UNC coarse thread standards, with a length of 3/4" and full threading. It meets ASME B18.3 and ASTM F835 manufacturing specifications, ensuring consistent quality and performance. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms environmental safety and regulatory adherence for global industrial use.
