National Marker N221770 Eye Eye Turnbuckle 3/8x16 in Zinc

Product Description

The NATIONAL MARKER N221770 is a 3/8 inch by 16 inch eye-and-eye turnbuckle designed for tensioning and adjusting tension in rigging, guy wire, and structural bracing applications. The body is hex shaped, making it easy to grip with a wrench for precise tension adjustments. It is manufactured from aluminum with a zinc finish for corrosion resistance, while the eyes are constructed from steel for added strength at the load-bearing connection points. This turnbuckle suits contractors, riggers, and maintenance professionals who need a reliable adjustable tensioning device for light to medium load applications.

This turnbuckle is appropriate for residential and commercial rigging setups, wire rope tensioning, fencing, antenna guy wire systems, and general structural bracing work. The eye-and-eye configuration allows attachment to hooks, shackles, eyebolts, or wire rope thimbles at both ends. It follows the catalog 2170BC series designation from National Marker and is sold individually.

Key Features

• Eye-and-eye configuration for versatile attachment at both ends
• Hex shaped body allows wrench engagement for controlled tensioning
• Aluminum body with zinc finish provides corrosion resistance
• Steel eyes deliver strength at load-bearing connection points
• 3/8 inch thread diameter with 16 inch take-up length
• Lightweight design at 0.463 pounds per unit

Compatibility

Designed as an OEM-style replacement or direct-use turnbuckle fitting standard 3/8 inch rigging hardware configurations in residential and commercial tensioning applications.

Installation Notes

Turnbuckles of this type are installed by qualified riggers or contractors following applicable load-rating and rigging safety standards. Always verify that the working load limit of the turnbuckle matches or exceeds the intended load before tensioning. Use a wrench on the hex body to adjust tension evenly, and secure the turnbuckle body with a locking wire or jam nut where vibration or cyclic loading is present. Inspect eyes and threads for wear or deformation before each use.

Technical Specifications

• Thread Diameter: 3/8 inches
• Take-Up Length: 16 inches
• End Type: Eye and Eye
• Body Shape: Hex
• Body Material: Aluminum
• Eye Material: Steel
• Finish: Zinc
• Weight: 0.463 pounds
• UPC: 00038613124837
• Catalog Series: 2170BC

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N221770