S-91251A552 1/4"-20 x 2 1/2" 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 ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in demanding industrial environments.
- Precise Class 3A thread fit provides tighter tolerances for secure fastening and vibration resistance in machinery assemblies.
- High hardness rating (Rockwell C37) enhances wear resistance, maintaining thread integrity through repeated use and adjustments.
- Hex socket drive design allows for high torque application and easy installation in confined spaces, improving assembly efficiency.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety for global supply chain integration.
- Partially threaded shank offers optimal grip and clamping force control, ideal for components requiring precise joint security.
Professional Applications & Engineering Value
These 1/4"-20 socket head cap screws are engineered with black-oxide alloy steel to address common industrial challenges such as corrosion, high-load stress, and assembly space constraints. The UNRC coarse threads and Class 3A fit ensure quick, secure fastening in heavy machinery, automotive systems, and precision equipment, minimizing loosening under vibration. The hex drive and standardized socket head profile facilitate efficient installation with common tools, reducing labor time. Ideal for applications requiring 170,000 psi tensile strength and consistent performance, these screws provide long-term reliability in manufacturing, construction, and OEM assemblies, backed by rigorous material standards.
Specification Summary & Compliance
This product adheres to Class 3A thread fit per UNRC standards, ensuring precise dimensional accuracy. Manufactured in compliance with ASTM A574 for material consistency, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental and safety adherence for industrial use.
