S-91268A992 1"-8 x 8" 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 load-bearing capability with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior wear and deformation resistance due to Rockwell C33 hardness, ensuring long-term durability
- Optimized for quick assembly with coarse UNC threading and Class 2A fit, reducing installation time
- Secure external hex drive provides excellent torque transmission and prevents stripping during tightening
- Partial threading design offers concentrated grip strength where needed most along the 8" length
- Full compliance with industrial standards including ASME B18.2.1 and SAE J429 for guaranteed interoperability
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for global supply chain integration
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical reliability for heavy machinery, structural steel connections, and industrial equipment where vibration resistance and structural integrity are paramount. The 1"-8 UNC coarse thread configuration maintains holding power in softer materials and allows for rapid installation in production environments. Manufactured from high-strength steel with Rockwell C33 hardness, it resists shear forces and fatigue failure common in dynamic loading scenarios. The partially threaded design concentrates clamping force precisely where needed, while the external hex drive ensures compatibility with standard industrial tools. These engineering features combine to reduce maintenance intervals and prevent costly downtime in demanding applications.
Specification Summary & Compliance
This fastener features Class 2A thread fit per ASME B18.2.1 specifications, ensuring consistent engagement and proper clearances. The 1"-8 UNC coarse thread with right-hand direction follows standardized industrial threading protocols. Manufacturing complies with ASME B18.2.1 and SAE J429 Grade 8 requirements for dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming restriction of hazardous substances for international industrial use.
