S-91268A410 1/4"-20 x 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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 strength for demanding applications with Grade 8 classification and 150,000 psi tensile strength, ensuring reliable performance under high stress.
- Superior durability and wear resistance thanks to Rockwell C33 hardness, providing long service life in harsh industrial environments.
- Easy installation and removal with external hex drive and coarse UNC threading, reducing assembly time and effort.
- Precise thread fit for secure fastening with Class 2A thread fit, minimizing the risk of loosening in vibrating machinery.
- Full threading for maximum grip along the entire 1/2" length, offering consistent clamping force across joined materials.
- Compliance with major industry standards including ASME B18.2.1 and SAE J429, ensuring compatibility and reliability in professional setups.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements for safe use.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical needs in machinery, construction, and automotive sectors where failure is not an option. The steel material combined with UNC coarse threading and Class 2A fit ensures rapid assembly and vibration resistance, reducing maintenance downtime. Its fully threaded design provides uniform stress distribution, preventing joint failure in high-load scenarios. With 150,000 psi tensile strength and Rockwell C33 hardness, it withstands extreme forces and abrasion, making it ideal for structural connections, equipment frames, and other demanding uses where reliability and longevity are paramount.
Specification Summary & Compliance
This screw features precise Class 2A thread fit per UNC standards, with dimensions of 1/4"-20 thread size and 1/2" length. It meets ASME B18.2.1 and SAE J429 specifications for consistent quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and adherence to international standards.
