National Marker N221721 Zinc Eye Eye Turnbuckle

Product Description

The NATIONAL MARKER N221721 is a 3/16-inch by 5-1/2-inch eye-and-eye turnbuckle with a zinc finish, part of the 2170BC catalog series. The hex-shaped body is manufactured from aluminum, while the eyes are steel, giving the assembly a combination of light weight and tensile strength at the connection points. Turnbuckles of this type are used to tension wire rope, cable, or rod assemblies by rotating the body to draw the two end fittings together or push them apart. Installation is performed by trade workers involved in rigging, structural bracing, theatrical rigging, or utility line work.

This turnbuckle is suited for light-duty tensioning applications where a compact, corrosion-resistant body is preferred. The aluminum hex body allows for wrench engagement during final tensioning adjustments. The zinc finish provides additional corrosion resistance for both indoor and sheltered outdoor environments. At 3/16-inch take-up diameter and 5-1/2-inch overall body length, this fitting is sized for small-diameter cable or rod tensioning tasks common in sign hanging, display rigging, and light structural applications.

Key Features

• Eye-and-eye configuration for direct attachment to cable, wire rope, or rod end fittings on both ends
• Hex-shaped aluminum body allows standard wrench engagement for precise tensioning
• Zinc finish on aluminum body provides corrosion resistance in indoor and sheltered environments
• Steel eyes deliver added strength at the load-bearing connection points
• Compact 3/16-inch by 5-1/2-inch size suits light-duty cable tensioning tasks
• Part of the 2170BC catalog series for straightforward cross-referencing

Compatibility

Designed as a standard eye-and-eye turnbuckle for light-duty cable and wire rope tensioning applications; consult the 2170BC series catalog for full take-up range and load rating details specific to this fitting.

Installation Notes

Turnbuckles should be installed by qualified riggers or trade workers familiar with applicable tensioning and rigging standards. Before adjustment, verify that all connected hardware is properly rated for the intended load. Use a wrench on the hex body for final tensioning, and always install locking wire or jam nuts after reaching the desired tension to prevent back-off under vibration or dynamic loading. Inspect threads and eyes for damage before each use.

Technical Specifications

• Body Diameter: 3/16 inches
• Body Length: 5-1/2 inches
• Body Shape: Hex
• Body Material: Aluminum
• Eye Material: Steel
• Finish: Zinc
• End Type: Eye and Eye
• Weight: 0.061 pounds
• UPC: 00038613124882

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N221721