S-92327A327 5/8"-11 x 2 1/2" ASME B18.2.1, SAE J429 Square Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With 120,000 psi tensile strength, this screw reliably handles high-stress applications without failure, ensuring long-term structural integrity.
• Superior Corrosion Resistance – The zinc yellow-chromate plating provides a durable barrier against rust and environmental degradation, extending service life in harsh conditions.
• High Hardness for Wear Resistance – Rockwell C25 hardness minimizes wear and deformation, maintaining fastener performance under repeated loads and vibrations.
• Easy Installation with External Square Drive – The square head design allows for secure tool engagement, reducing slippage and speeding up assembly in tight spaces.
• Reliable Thread Engagement – Coarse UNC threads and Unified Standard Class 2A fit ensure consistent, vibration-resistant connections in various materials.
• Full Threading for Maximum Grip – Fully threaded along the 2 1/2" length, it offers adjustable clamping force and versatility across different material thicknesses.
• Certified Quality Assurance – Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent dimensions, strength, and interoperability in industrial settings.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 5 square head screw addresses critical challenges in construction, machinery assembly, and structural frameworks. The zinc yellow-chromate plated steel construction combats corrosion in outdoor or high-moisture environments, reducing maintenance costs and downtime. Its coarse UNC thread and external square drive facilitate quick, secure fastening even in confined areas, while the SAE Grade 5 medium strength rating ensures it withstands dynamic loads and vibrations without loosening. Ideal for bolting heavy equipment, steel frames, and automotive components, this fastener delivers reliable performance where high tensile strength and durability are non-negotiable.

Specification Summary & Compliance

This square head screw features precise Unified Standard Class 2A thread fit and 5/8"-11 UNC coarse threading for consistent engagement. It meets ASME B18.2.1 dimensional standards and SAE J429 material specifications, ensuring interoperability and reliability. The product is manufactured from steel with a zinc yellow-chromate plating finish, providing corrosion protection. With a tensile strength of 120,000 psi and hardness of Rockwell C25, it complies with industry regulations for medium-strength fasteners in demanding applications.