Campbell CHB300 3-Inch Hand Line Utility Block with Latched Swivel Hook

Reliable Hand Line Utility for Stringing Applications
The Campbell CHB300 3-Inch Hand Line Utility Block with Latched Swivel Hook (7380300) is designed for utility professionals who need dependable equipment for stringing conductor cable or fiber rope. This lightweight hand line block combines a rugged construction with a convenient side-opening design, making it a practical addition to lineman and utility rigging equipment.
The CHB300 features a block and sheave molded from reinforced nylon fiberglass high-dielectric material. Its 3-inch sheave accommodates rope up to 5/8 inch in diameter, providing versatility for a variety of hand line applications. The zinc-plated swivel hook includes a safety latch for secure attachment during use.
Built for Utility and Lineman Work
With a 1,000-pound safe working load limit and a 3:1 design factor, the Campbell CHB300 is built to provide reliable performance when handling appropriate loads. The lightweight construction helps make the block easier to handle and transport, which can be especially useful for utility crews working in the field.
The reinforced nylon fiberglass construction also provides high-dielectric properties, making this block well suited to applications where electrical considerations are important. Campbell lists the CHB300 at approximately 1.90 pounds, while Hi-Line Tool lists the product weight as 2 pounds.
A Practical Addition to Your Rigging Equipment
For utility crews, having the right hand line block can make material handling and stringing tasks more efficient. The CHB300’s side-opening design, swivel hook with safety latch, 3-inch sheave, and 5/8-inch rope capacity provide a useful combination of convenience and functionality.
Whether you’re outfitting a lineman’s rigging kit or replacing an existing utility block, the Campbell CHB300 offers a compact solution designed specifically for conductor cable and fiber rope applications. Its lightweight design and 1,000-pound working load limit make it a practical choice for many professional utility applications.
Sources
- Hi-Line Tool Co. – Campbell CHB300 Product Page
- Campbell – CHB300 3-Inch Hand Line Utility Block Specifications
- Campbell – 3-Inch Utility Block Product Information












