Value Collection 489038PR Carriage Bolt 1/4-20 7 in Zinc Grade 2

Product Description

The VALUE COLLECTION 489038PR is a 1/4-20 UNC carriage bolt with a 7-inch length under head, square neck, and zinc-plated Grade 2 steel construction. Carriage bolts are designed for through-bolting applications where a smooth, rounded head is required on the bearing surface and the square neck resists rotation during tightening. This fastener meets ASTM A307 standards, making it suitable for general structural and mechanical assembly work. The zinc plating provides baseline corrosion resistance for interior and sheltered exterior installations. Electricians, plumbers, HVAC techs, and general contractors reach for this bolt style when securing wood-to-wood or wood-to-metal connections in equipment mounting, framing, and support structures.

This carriage bolt is appropriate for a wide range of light structural and mechanical fastening tasks in residential and light commercial construction and equipment installation. Typical applications include securing equipment supports, strut channel assemblies, lumber connections, and bracket mounts. The 1/4-20 UNC thread is one of the most common inch-series thread sizes in trade work, and the 7-inch under-head length suits thicker stacked assemblies where standard short bolts fall short. Minimum order quantity is 100 pieces per order, sold as a single-unit package quantity.

Key Features

• 1/4-20 UNC thread for compatibility with standard inch-series nuts and tapped hardware
• 7-inch length under head accommodates thicker material stacks
• Square neck locks into wood or slotted holes to prevent bolt rotation during nut tightening
• Grade 2 steel construction meets ASTM A307 fastener standard
• Zinc plating provides corrosion resistance in dry and sheltered environments
• Smooth domed head leaves a clean, snag-free bearing surface

Compatibility

Designed as a standard inch-series carriage bolt compatible with 1/4-20 UNC hex nuts, wing nuts, and washers. Fits standard 1/4-inch clearance holes in wood, light steel, and bracket stock used in general trade fastening applications.

Installation Notes

Installation is performed by inserting the bolt through a pre-drilled clearance hole and seating the square neck into the material to prevent rotation, then threading and torquing the nut from the opposite side. No special tools beyond a wrench or socket are required for the nut side. For structural applications, consult applicable building codes for required fastener grades and spacing. Minimum order quantity of 100 pieces applies to this SKU.