The Lawson 337 Heavy Hex Nut is a high-quality fastener made of black alloy steel, specifically ASTM A194 Grade 2H. This nut is designed with a #8 thread size and a unit quantity of 5. Manufactured in the United States by the reputable brand Lawson, this heavy hex nut is a reliable and durable option for various industrial and commercial applications requiring a sturdy and long-lasting fastener solution.