S-90044A226 2 1/4"-4 1/2 x 8" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 psi provides reliable performance in high-stress applications, reducing the risk of fastener failure.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish suitable for harsh industrial environments.
- Coarse UNC threads with Class 2A fit ensure easy assembly and disassembly, minimizing cross-threading and improving installation efficiency.
- Partially threaded design allows for precise clamping force control and secure fastening in specific joint configurations.
- 1 3/4" hex drive and standard socket head enable high-torque application with standard tools, preventing stripping and ensuring tight fastening.
- Rockwell C37 hardness delivers superior wear resistance and long-term durability under repetitive loads.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency, environmental safety, and adherence to international industrial standards.
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where high tensile strength and corrosion resistance are paramount. The coarse UNC thread and Class 2A fit facilitate quick, reliable installations in demanding conditions, reducing downtime. Its partially threaded rod type provides optimal grip in bolted joints, preventing loosening from vibrations. With a Rockwell C37 hardness and 170,000 psi tensile strength, it withstands extreme mechanical stresses, making it ideal for structural frames, industrial equipment, and high-load fastening applications that require durability and compliance with ASTM A574 standards.
Specification Summary & Compliance
This screw features a 2 1/4"-4 1/2 UNC coarse thread with Class 2A dimensional accuracy for consistent fit. It is manufactured to ASTM A574 specifications, ensuring high-quality alloy steel material. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety standards for industrial use worldwide.
