S-91283A132 1 1/8"-7 x 2 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• High Tensile Strength: Withstands up to 100,000 psi, ensuring reliable performance under heavy loads and reducing the risk of fastener failure in demanding applications.
• Superior Durability: Made from Grade 5 steel with Rockwell C19 hardness, offering excellent resistance to wear and deformation for long service life.
• Optimal Grip & Fastening: Fully threaded 1 1/8"-7 UNC coarse thread design provides enhanced holding power and quicker installation in various materials.
• Precise Thread Fit: Class 2A thread fit ensures consistent, secure engagement with mating parts, minimizing loosening and improving assembly reliability.
• Easy Installation & Removal: External hex drive and hex head design allow for straightforward tightening with standard tools, saving time and labor costs.
• Broad Industrial Compliance: Meets ASME B18.2.1 and SAE J429 standards, guaranteeing dimensional accuracy and interoperability in machinery and structural applications.
• Environmental & Safety Assurance: RoHS 3 and REACH compliant, ensuring safe use without hazardous substances for global supply chain requirements.

Professional Applications & Engineering Value

This Grade 5 steel hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, construction, and automotive frameworks. Its 1 1/8"-7 UNC coarse thread and fully threaded design deliver superior clamping force and vibration resistance, preventing joint failure in high-stress environments. The external hex drive facilitates efficient installation with common wrenches, reducing downtime. Made from high-strength steel, it combats corrosion and mechanical fatigue, offering a dependable solution for applications requiring 100,000 psi tensile strength and compliance with industry standards like ASME B18.2.1, making it ideal for structural fastening and equipment maintenance.

Specification Summary & Compliance

This fastener features a Class 2A thread fit for precise tolerance, adhering to UNC thread standards with a coarse spacing for robust performance. It complies with ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and reliability. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and suitability for international industrial use.