S-92620A237 1 1/4"-7 x 5" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: With a tensile strength of 150,000 psi and Rockwell C33 hardness, this bolt reliably withstands extreme mechanical stresses in demanding applications.
• Superior Corrosion Resistance: The zinc yellow-chromate plating provides a durable barrier against rust and environmental degradation, extending service life in harsh conditions.
• High-Strength Grade 8 Reliability: Manufactured to Grade 8 standards, ensuring consistent performance for critical, high-stress industrial fastening needs.
• Optimized for Quick Assembly: The coarse 1-1/4"-7 UNC thread and external hex drive allow for rapid installation and removal, reducing labor time and effort.
• Precision Thread Fit: Class 2A thread tolerance ensures smooth engagement and reliable clamping force, minimizing the risk of cross-threading or loosening.
• Versatile Partial Threading: The partially threaded design provides an unthreaded shank for enhanced shear strength where needed, offering flexibility in various assembly setups.
• Regulatory Compliance Assurance: Meets ASME B18.2.1, SAE J429, RoHS 3, and REACH standards, guaranteeing safety, quality, and environmental responsibility.

Professional Applications & Engineering Value

This Grade 8 hex head bolt is engineered to address critical challenges in heavy machinery, structural steelwork, and industrial equipment assembly. Its high tensile strength and Rockwell C33 hardness make it ideal for applications subject to dynamic loads and vibrations, preventing joint failure. The zinc yellow-chromate plating offers robust corrosion resistance, essential for outdoor or chemically exposed environments, while the coarse UNC thread ensures quick, secure fastening even in dirty or imperfectly aligned holes. By combining partial threading with a sturdy external hex drive, it provides both shear resistance and easy maintenance, reducing downtime in manufacturing, construction, and automotive sectors.

Specification Summary & Compliance

This bolt features a 1-1/4"-7 UNC coarse thread with Class 2A fit for precise tolerance, a 5" length, and partial threading with a minimum thread length of 2-3/4". It is manufactured from steel and complies with ASME B18.2.1 and SAE J429 specifications. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations.