S-91268A881 3/4"-10 x 7" 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
- Maximum Load-Bearing Capability – With 150,000 psi tensile strength and Grade 8 classification, this screw withstands extreme mechanical stresses in heavy machinery and structural assemblies.
- Superior Wear & Corrosion Resistance – Manufactured from high-grade steel with Rockwell C33 hardness, ensuring long-term durability and reduced replacement frequency in harsh environments.
- Optimized Thread Engagement – Coarse UNC thread design and Class 2A thread fit enable faster installation and reliable clamping force, minimizing the risk of cross-threading.
- Enhanced Torque Transmission – External hex drive and 1 1/8” head width provide secure tool engagement, allowing for high-torque tightening without slippage.
- Versatile Partial Threading – 2” minimum thread length on a 7” shank offers flexibility for applications requiring both threaded and unthreaded grip areas.
- Regulatory & Quality Assurance – Compliant with ASME B18.2.1, SAE J429, RoHS 3, and REACH, ensuring material safety and performance consistency for industrial use.
Professional Applications & Engineering Value
Engineered for demanding industrial environments, this Grade 8 hex head screw delivers exceptional reliability in heavy machinery, construction frameworks, and equipment assembly. The 3/4"-10 UNC coarse thread ensures rapid installation and robust vibration resistance, while the partially threaded design allows precise load distribution across joint interfaces. Made from high-strength steel with Rockwell C33 hardness, it resists deformation under cyclic loading, reducing maintenance downtime. Ideal for structural bolting, mining equipment, and automotive applications, this screw meets ASME B18.2.1 specifications, providing engineers with a trusted, standards-compliant fastener solution.
Specification Summary & Compliance
This hex head screw adheres to inch system dimensions with a 7" length, 3/4"-10 UNC coarse thread, and Class 2A thread fit for consistent assembly tolerance. Manufacturing follows ASME B18.2.1 and SAE J429 standards, with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability.
