National Hardware 1/2" x 6" Hook/Eye Turnbuckle is expertly designed for marine, industrial, and construction applications, ensuring reliable performance in demanding environments. This turnbuckle meets federal specifications FF-T-791B, Type 1, Form 1, Class 5, ing high standards of quality and durability. The end fittings are heat treated to provide added strength, and the entire piece is manufactured from forged steel, making it a robust and dependable choice for your fastening needs. Model Number: N177-501