S-90044A272 1"-12 x 4" 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
- Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Corrosion-resistant black-oxide finish on alloy steel enhances durability and extends service life in harsh industrial environments.
- Precision Class 3A thread fit with UNRF fine threads provides superior vibration resistance and secure fastening in critical assemblies.
- Partially threaded design allows for controlled clamping force and easier alignment in complex machinery setups.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
- 3/4" hex drive socket head enables high-torque installation with standard tools, speeding up assembly and maintenance processes.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global supply chain integration.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these black-oxide alloy steel socket head cap screws address common challenges in heavy machinery, automotive, and aerospace assemblies. The UNRF fine thread profile with Class 3A fit minimizes loosening under vibration, critical for dynamic load environments. With a partially threaded shank and 4" length, they provide optimal grip range without unnecessary threading, reducing stress concentration. The corrosion-resistant coating combined with 170,000 psi tensile strength ensures long-term reliability in exposed or high-temperature conditions, making them ideal for structural frames, engine components, and precision equipment where failure is not an option.
Specification Summary & Compliance
This socket head cap screw features a 1"-12 UNRF fine thread with Class 3A tolerance for precise fit, and a minimum thread length of 3". Manufactured to ASTM A574 specifications, it guarantees consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial use worldwide.
