Value Collection 215098MSC Carriage Bolt 1/4-20 1-1/2 in Grade 8

Product Description

The VALUE COLLECTION 215098MSC is a Grade 8 alloy steel carriage bolt designed for high-strength fastening applications. It features a 1/4-20 UNC thread size with a 1-1/2 inch length under head and a square neck that locks the bolt in place when drawn into a pre-drilled hole, preventing rotation during nut tightening. The bolt is fully threaded and left uncoated with a bright finish. Manufactured to SAE J429 standards, this fastener is suited for structural assemblies, machinery, and equipment where high tensile strength and reliable clamp load are required. Sold in packages of 100.

This carriage bolt is used in a wide range of industrial, construction, and mechanical assembly applications. The square neck design is intended for use in wood, thin metal, or pre-punched panels where the neck seats into the material to resist torque. Grade 8 alloy steel makes it appropriate for heavy-duty connections subject to vibration and dynamic loading. Typical installers include maintenance technicians, millwrights, ironworkers, and contractors working on structural or mechanical assemblies requiring inch-standard hardware.

Key Features

• Grade 8 alloy steel construction provides high tensile and proof load strength
• 1/4-20 UNC fully threaded shank with 1-1/2 inch length under head
• Square neck prevents bolt rotation during installation without a wrench on the head
• Bright uncoated finish for applications where surface treatment is not required
• Manufactured to SAE J429 fastener standard for consistent mechanical properties
• Packaged in quantities of 100 for high-volume fastening work

Compatibility

Designed as a standard inch-series carriage bolt compatible with any application requiring a 1/4-20 UNC fastener with a domed round head and square neck per SAE J429 specifications.

Installation Notes

Insert the bolt through a pre-drilled or pre-punched hole sized to allow the square neck to seat flush and grip the material. Apply a standard hex nut and flat washer on the threaded end and tighten with an appropriate wrench or socket — no tool is required on the head when the neck is properly seated. Ensure hole diameter matches the bolt shank for correct neck engagement. Follow applicable structural or mechanical codes for torque and joint requirements.