S-91255A037 5/16"-18 x 3" 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 high-stress applications, reducing the risk of fastener failure.
- Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant assemblies in demanding environments.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life and reducing maintenance needs.
- Hex drive design with 3/16" drive size allows for easy installation and high torque application, improving assembly efficiency.
- Fully threaded UNC coarse thread ensures faster installation and stronger holding power in a wide range of materials.
- Rounded button head profile provides a low-profile, finished appearance while minimizing snagging in assembled products.
- Compliance with ASME B18.3 and ASTM F835 guarantees consistent quality and interoperability in industrial and mechanical systems.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Black-Oxide Alloy Steel screws address critical challenges in machinery assembly, structural frameworks, and equipment manufacturing. The Class 3A thread fit and coarse UNC threading ensure rapid, secure fastening even in high-vibration settings, reducing assembly time and improving joint integrity. With a Rockwell C39 hardness and 120,000 psi tensile strength, they withstand extreme loads and repetitive stress, making them ideal for construction, automotive, and aerospace components. The hex drive design facilitates quick installation with standard tools, while the rounded head minimizes protrusion risks in compact spaces.
Specification Summary & Compliance
This screw meets precise dimensional standards with a Class 3A thread fit and UNC coarse thread spacing, ensuring compatibility with industry components. It conforms to ASME B18.3 and ASTM F835 specifications for consistent performance. Additionally, the product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmental and safety regulations in global markets.
