S-91268A431 1/2"-13 x 1 1/4" 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 capacity with 150,000 PSI tensile strength for demanding industrial applications
- Superior wear resistance due to Rockwell C33 hardness, extending service life in high-stress environments
- Reliable coarse UNC threading ensures quick assembly and vibration resistance in heavy machinery
- Precision Class 2A thread fit guarantees consistent engagement and reduces cross-threading risks
- Full-length threading provides maximum grip strength across the entire 1 1/4" length
- External hex drive design allows for high-torque installation with standard tools
- Comprehensive regulatory compliance meets ASME, SAE, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws address critical challenges in construction, machinery assembly, and structural fabrication. The steel construction combined with 150,000 PSI tensile strength provides exceptional resistance to dynamic loads and shock impacts, preventing fastener failure in high-vibration environments. The coarse UNC thread pattern ensures rapid installation and superior holding power in both soft and hard materials, while the external hex drive accommodates high-torque applications without stripping. These fully threaded screws maintain consistent clamping force across the entire engagement length, making them ideal for critical joints in industrial equipment, automotive systems, and structural steel connections where reliability is paramount.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with Class 2A thread fit tolerance for consistent performance. Complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, ensuring safe use in regulated industries worldwide.
