S-91251A305 3/4"-16 x 6" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head 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 black-oxide coating, extending service life in harsh industrial environments.
- Exceptional tensile strength (170,000 psi) ensures reliable performance under high-stress applications without failure.
- Precision Class 3A thread fit guarantees tight, secure fastening with minimal backlash in critical assemblies.
- High hardness (Rockwell C37) provides excellent wear resistance, maintaining thread integrity through repeated use.
- Hex socket drive design allows for high-torque installation in confined spaces, improving assembly efficiency.
- Fine thread spacing (UNRF) offers enhanced vibration resistance and better load distribution compared to coarse threads.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety for global supply chains.
Professional Applications & Engineering Value
This Socket Head Cap Screw is engineered from black-oxide alloy steel to address common industrial challenges such as corrosion, high mechanical stress, and vibration-induced loosening. The Class 3A UNRF fine thread provides superior clamping force and fatigue resistance, making it ideal for heavy machinery, automotive systems, and precision equipment where reliability is critical. The partially threaded design with a 2" minimum thread length allows for optimal grip in thick materials, while the hex drive facilitates easy installation in tight spaces. Its high tensile strength and hardness ensure long-term durability, reducing maintenance needs and downtime in demanding applications like construction, aerospace, and manufacturing assemblies.
Specification Summary & Compliance
This screw features a 3/4"-16 UNRF fine thread with Class 3A fit for precise tolerance, a 6" length, and 2" minimum thread length. It meets ASTM A574 specifications for high-strength socket head cap screws, ensuring consistent material and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and environmentally responsible usage in industrial settings.
