Find a huge selection of DIN6921 Grade 4.8 / 8.8 Blue Zinc Plated Flange Bolts from China at Gangtong Zheli. Provide professional after-sales service and the right price, looking forward to cooperation. DIN6921 Grade 4.8/8.8 Blue Zinc Plated Flange Bolts are versatile and reliable fasteners known for their strength, corrosion resistance, and suitability for various industrial applications. These bolts, available in different grades and sizes, cater to specific load and application needs while offering enhanced protection against corrosion in diverse environments.

Grade 4.8 or 8.8 Carriage Bolt With Zinc Plated or Hot Dip Galvanized Surface

Hexagonal (hex head) design with an integrated flange beneath the head. The flange provides a broader surface area for distributing clamping force and acts as a built-in washer. Suitable for a wide range of applications across industries, including machinery, automotive, construction, and more. These bolts are utilized where secure and stable connections are essential.

Specially designed flange bolts are equipped with anti-rotational “teeth” designed to “bite” or dig into the material one might need to fasten together. Similar to the locking rings one might see on a soda bottle or milk jug, these teeth on the flange bolt can be turned backward, but often require more force. This type of design is what makes a flange bolt uniquely and strategically different from a common bolt.

An essential addition to the flange bolt is the flange nut. While it is similar to an ordinary nut, one side of the flange nut is wider than the other to ensure even pressure distribution. The flange nut and flange bolt work well together, and in some cases may reduce costs by eliminating the need for purchasing separate washers. Proper torque on a flange bolt-nut combination will ensure that the fasteners never become loose by themselves. Only an outside force, such as a mechanic, can loosen these types of flange bolts.

Product Application

The specific type of flange bolt needed to join flanges together isn't primarily determined by a standard or metric designation. Instead, it's typically the physical dimensions of the flange system or the specific quantity of boltholes that dictate the suitable bolt size or grade. The bolt's grade denotes its strength, with higher-grade bolts offering increased strength and reliability. For instance, demanding applications like high-pressure steam lines might necessitate the use of grade eight bolts to ensure maximum safety and reliability.

Flange bolts are compatible with a wide range of flange systems. The required sizes and grades, or strength ratings, may vary based on the specific application. These bolts are available in standard measurements, such as 1/4 inch and 1/2 inch, as well as metric measurements like 8mm and 10mm. Engineered to securely maintain connections without slipping or loosening, flange bolts are standard components in numerous industrial applications where establishing dependable and secure connections is vital for smooth production processes.