S-91247A569 1/4"-20 x 7 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex 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 load-bearing capacity with 120,000 psi tensile strength, ideal for high-stress industrial assemblies
- Superior corrosion resistance through zinc plating, extending service life in demanding environments
- Optimized thread engagement with 1/4"-20 UNC coarse threads and Class 2A fit for reliable fastening and vibration resistance
- Enhanced torque transmission via external hex drive and 7/16" head width for secure installation with standard tools
- Controlled thread distribution with partial threading to prevent binding in deep-hole applications
- Certified material integrity meeting Grade 5 standards with Rockwell C25 hardness for consistent performance
- Regulatory compliance assurance with RoHS 3 and REACH adherence for global supply chain integration
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers critical engineering solutions where vibration resistance and structural integrity are paramount. The partially threaded 1/4"-20 UNC coarse thread configuration prevents cross-threading in blind holes while maintaining clamping force in machinery, structural steel, and heavy equipment assemblies. The zinc plated steel construction combats environmental degradation in manufacturing plants, agricultural equipment, and transportation infrastructure. With external hex drive compatibility, installers achieve precise torque control during high-volume assembly operations. The 7 1/2" length accommodates thick material stacks in construction and industrial framing applications where standard fasteners fall short.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 and SAE J429 Grade 5 specifications with Class 2A thread fit for consistent dimensional accuracy. The UNC coarse thread profile ensures rapid installation in production environments. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for hazardous substance restrictions. Mechanical properties include Rockwell C25 hardness and 120,000 psi tensile strength verified through quality control processes.
