Value Collection 216257MSC Carriage Bolt 1/2-13 5 in Grade 8

Product Description

The VALUE COLLECTION 216257MSC is a Grade 8 alloy steel carriage bolt with a 1/2-13 UNC thread and a 5-inch length under head. The square neck beneath the domed head resists rotation during installation, eliminating the need for a wrench on the bolt side. Finished with a clear zinc chromate coating for basic corrosion resistance, this fully threaded fastener meets SAE J429 standards. It is suited for high-strength bolted connections in structural, mechanical, and heavy equipment assemblies where Grade 8 tensile strength is required.

This carriage bolt is used in applications that demand a Grade 8 fastener, including farm equipment, trailer frames, utility structures, and heavy-duty framing assemblies. The 1/2-13 UNC thread is a common size across industrial and construction hardware, making this bolt a standard replacement or new-installation choice for maintenance crews and fabricators working with inch-dimensioned hardware.

Key Features

• Grade 8 alloy steel construction for high tensile strength and load capacity
• 1/2-13 UNC fully threaded shank, 5 inches length under head
• Square neck locks against material surface to prevent bolt spin during nut tightening
• Clear zinc chromate finish provides baseline corrosion protection
• Meets SAE J429 fastener standard
• Sold in a package of 10 bolts

Compatibility

Designed as a standard inch-series carriage bolt for use with 1/2-13 UNC hex nuts and corresponding hardware in structural and mechanical assemblies requiring Grade 8 fasteners.

Installation Notes

Installation is performed by inserting the bolt through a pre-drilled hole so the square neck seats into the material, preventing rotation. A wrench or socket is applied only to the nut side. Verify the mating nut and any washers are also rated Grade 8 to maintain the integrity of the joint. Follow applicable torque specifications for 1/2-13 Grade 8 fasteners as defined by the equipment manufacturer or relevant industry standards.