S-90044A188 7/16"-20 x 4 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 provides reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Class 3A thread fit ensures precise, tight engagement for secure assemblies and improved vibration resistance in machinery.
- Black-oxide finish on alloy steel offers enhanced corrosion resistance, extending service life in demanding environments.
- Partially threaded design allows for controlled clamping force and easier alignment in precision assemblies.
- Fine UNF thread spacing delivers superior holding power and reduced loosening under dynamic loads.
- Hex socket drive (3/8") enables high-torque installation with standard tools, facilitating efficient maintenance and assembly.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety for global supply chains.
Professional Applications & Engineering Value
This 7/16-20 UNF Socket Head Cap Screw is engineered for heavy-duty applications where reliability is critical. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness, resists wear and corrosion in industrial settings such as machinery frames, automotive assemblies, and construction equipment. The fine thread spacing and Class 3A thread fit minimize backlash and maintain clamp load under vibration, addressing common failure points in dynamic systems. Its partially threaded shank allows for precise positioning, making it ideal for use in jigs, fixtures, and high-precision engineering projects where alignment and strength are paramount.
Specification Summary & Compliance
This fastener adheres to Class 3A thread fit tolerances for precision, with UNF fine threads (7/16"-20) and a right-hand thread direction. It meets ASTM A574 specifications for high-strength socket head cap screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are upheld in industrial applications.
