Value Collection 489021PS Carriage Bolt 1/4-20 1-1/4 in Square Neck

Product Description

The VALUE COLLECTION 489021PS is a 1/4-20 UNC carriage bolt with a 1-1/4 inch length under head and a square neck profile. Made from Grade 2 steel with a zinc-plated finish, this fastener meets ASTM A307 standards for general-purpose structural and mechanical applications. The square neck seats flush against the material surface during installation, preventing rotation without a secondary tool on the bolt head. This style of fastener is commonly used by contractors, plumbers, electricians, and HVAC technicians wherever a low-profile, tamper-resistant connection is required in light to moderate load assemblies.

Appropriate for residential and light commercial applications, the 489021PS carriage bolt is suited for wood-to-wood, wood-to-metal, and bracket connections encountered in equipment mounting, duct support, panel framing, and general structural assembly. The zinc coating provides basic corrosion resistance in dry to mildly humid indoor environments. This bolt is sold in a minimum order quantity of 100 units per order, making it practical for stocking and repetitive-use trade work.

Key Features

• 1/4-20 UNC thread size for compatibility with standard nuts and threaded hardware
• 1-1/4 inch length under head for shallow-to-medium material stack applications
• Square neck design prevents bolt rotation during nut tightening without a wrench on the head
• Grade 2 steel construction meets ASTM A307 fastener standard
• Zinc-plated finish provides basic corrosion resistance in indoor environments
• Inch measurement system for compatibility with standard Imperial tooling and hardware

Compatibility

Designed as a standard UNC carriage bolt for use with 1/4-20 hex nuts, washers, and threaded inserts in general-purpose fastening applications across HVAC, plumbing, electrical, and construction trades.

Installation Notes

Installation requires inserting the bolt through a pre-drilled hole sized for a snug fit so the square neck locks into the material and prevents spinning. A standard open-end or socket wrench is used to drive the mating nut. Always verify hole diameter matches the bolt shank before assembly. Follow applicable building codes and equipment manufacturer torque guidance for the specific assembly being fastened.