National Marker N221903 Zinc Hook Eye Turnbuckle

Product Description

The NATIONAL MARKER N221903 is a hook and eye turnbuckle built for tension adjustment in rigging, bracing, and tie-down applications. The body is hex-shaped aluminum with a zinc finish, and the hook and eye hardware is steel. The overall length is 17 inches, with a 0.5-inch body diameter, making this a compact turnbuckle suited for light-to-medium-duty tensioning tasks. It is sold individually and is installed by tradespeople working in mechanical, structural, or general construction settings where precise cable or rod tension is required.

This turnbuckle is appropriate for use in residential and commercial applications where a hook-and-eye configuration is specified. Common uses include tensioning guy wires, antenna supports, fence lines, bracing rods, and similar rigging assemblies. The hex-shaped body allows for wrench engagement during adjustment, which is useful in tight quarters or when high torque is needed to achieve proper tension. The zinc finish provides corrosion resistance for indoor and protected outdoor environments.

Key Features

• Hex-shaped aluminum body allows standard wrench engagement for precise tension adjustment
• Zinc finish on body provides corrosion resistance in protected environments
• Steel hook and eye hardware for durability at connection points
• 17-inch overall length suits light-to-medium-duty rigging and bracing tasks
• Catalog series 2172BC — hook and eye configuration

Compatibility

Designed as an OEM-style replacement or direct-use turnbuckle for standard hook and eye rigging applications requiring a 0.5-inch by 17-inch form factor.

Installation Notes

Installation should be performed by a qualified tradesperson familiar with rigging hardware and applicable load ratings. Ensure all tension is released from the assembly before removing or replacing the turnbuckle. Use an appropriately sized wrench on the hex body to make final tension adjustments — do not use pipe wrenches or pliers that may deform the aluminum body. Verify that the hook and eye endpoints are fully seated and secured before returning the assembly to service.

Technical Specifications

• Body Shape: Hex
• Body Material: Aluminum
• Finish: Zinc
• Hook and Eye Material: Steel
• Body Diameter: 0.5 inches
• Overall Length: 17 inches
• Weight: 0.933 pounds
• Catalog Series: 2172BC
• UPC: 00038613125087

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N221903