Value Collection 215557MSC Carriage Bolt 3/8-16 2-1/2 in Grade 8

Product Description

The VALUE COLLECTION 215557MSC is a Grade 8 alloy steel carriage bolt with a 3/8-16 UNC thread and a 2-1/2 inch length under head. The square neck seats flush into the mating material upon tightening, preventing rotation without the need for a wrench on the bolt head. A zinc trivalent chromate finish provides corrosion resistance for general industrial and structural applications. This bolt is fully threaded along its 2-1/2 inch shank, conforming to SAE J429 standards. Maintenance technicians, ironworkers, and general contractors install this fastener in wood-to-metal and metal-to-metal connections across a wide range of structural assemblies.

This carriage bolt is suited for structural fastening tasks in both residential construction and light commercial applications. The 3/8-16 UNC thread pattern is a standard size widely used in framing, equipment mounting, and fixture assembly. The Grade 8 alloy steel construction provides high tensile strength where standard hardware-grade fasteners would be insufficient. The zinc trivalent chromate finish meets current environmental standards as a replacement for hexavalent chromate coatings, making it appropriate for applications with compliance requirements.

Key Features

• Grade 8 alloy steel construction for high tensile strength in demanding structural applications
• 3/8-16 UNC fully threaded shank, 2-1/2 inches length under head
• Square neck design locks bolt in place during tightening, requiring no tool on the bolt head
• Zinc trivalent chromate finish for corrosion resistance and environmental compliance
• Conforms to SAE J429 fastener standard
• Inch measurement system; compatible with standard SAE tooling

Compatibility

Designed as a standard SAE J429 Grade 8 carriage bolt for use in structural and general fastening applications requiring a 3/8-16 UNC thread pattern.

Installation Notes

A licensed contractor or qualified tradesperson should verify that bolt grade and size meet the structural load requirements of the application before installation. Power down or de-energize any adjacent equipment before working in confined assemblies. The square neck must be fully seated into the mating substrate to prevent rotation during nut tightening. Apply appropriate torque using a calibrated torque wrench in accordance with SAE J429 guidelines and applicable building codes.