S-92865A551 1/4"-20 x 2 1/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength: With 120,000 PSI tensile strength, this screw provides reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior Corrosion Resistance: Zinc plating offers enhanced protection against rust and environmental elements, extending service life in demanding industrial settings.
• High-Grade Material Durability: Made from Grade 5 steel with Rockwell C25 hardness, ensuring consistent strength and wear resistance under heavy loads.
• Easy Installation and Removal: External hex drive and coarse UNC threads allow for quick assembly and disassembly, saving time in maintenance and production.
• Precise Thread Fit: Class 2A thread fit ensures smooth engagement and reliable fastening, minimizing cross-threading and improving joint integrity.
• Full Threading for Maximum Grip: Fully threaded design provides uniform holding power along the entire length, ideal for secure connections in various materials.
• Compliance with Industry Standards: Meets ASME B18.2.1 and SAE J429 specifications, guaranteeing quality and interoperability in professional applications.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in harsh environments. The zinc plated steel construction combats moisture and chemical exposure, while the coarse UNC threads and external hex drive facilitate efficient installation in machinery, structural frames, and automotive assemblies. With a tensile strength of 120,000 PSI and full threading, it ensures robust, long-lasting fastening in heavy-duty applications, reducing maintenance downtime and enhancing operational safety. Ideal for use in construction, manufacturing, and equipment repair, this screw delivers consistent performance where reliability is critical.

Specification Summary & Compliance

This fastener features precise Class 2A thread fit and adheres to UNC thread standards with a 1/4"-20 thread size. It complies with ASME B18.2.1 and SAE J429 manufacturing specifications, ensuring dimensional accuracy and performance consistency. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substance restrictions.