Prime Line Products Gd 52103 Carriage Bolt Nut Set 12 Pack

Product Description

The PRIME LINE PRODUCTS GD 52103 is a 12-pack set of 1/4-20 carriage bolts and matching nuts designed for secure, tamper-resistant fastening in a wide range of trade and repair applications. Each bolt measures 1/4 inch diameter by 1-7/8 inches in length with 20 teeth per inch (TPI) threading. The bolts are constructed of steel with a zinc-plated finish for corrosion resistance. A square shoulder section beneath the smooth domed head locks into the mounting surface during installation, preventing the bolt from spinning as the nut is tightened. This set is well suited for HVAC equipment panels, pool equipment enclosures, and general mechanical assemblies.

This fastener set is used in residential and light commercial applications where a clean, low-profile domed head is required on the visible face of the assembly. Common install scenarios include securing equipment access panels, mounting brackets, gates, fencing, and structural wood or metal connections. The zinc-plated finish provides a base level of corrosion resistance suitable for dry or sheltered environments. Each pack contains 12 pieces, providing enough hardware for multiple fastening points in a single service call.

Key Features

• 1/4-20 threading at 20 TPI for standard fastener compatibility
• 1/4 inch diameter by 1-7/8 inch length bolt dimensions
• Smooth domed head profile for a clean, finished appearance on exposed faces
• Square anti-spin shoulder beneath the head prevents bolt rotation during nut tightening
• Steel construction with zinc-plated finish for corrosion resistance
• 12-piece pack covers multiple fastening points per job

Compatibility

Designed as a standard 1/4-20 carriage bolt and nut replacement suitable for general mechanical, structural, and equipment fastening applications where a domed-head bolt with anti-spin shoulder is required.

Installation Notes

Installation is typically performed by any trade professional or knowledgeable technician using standard hand tools. Insert the bolt through the pre-drilled hole so the square shoulder seats fully into the material to prevent rotation, then thread the nut from the opposite side. Power down or de-energize any equipment before replacing fasteners on electrical or mechanical enclosures. Follow applicable local codes and equipment manufacturer guidelines for fastener torque requirements.