RAW MATERIAL: 1035 1045
FINISH: BLACKZP
STANDARD: DIN6921 /ASME B 18.2.1
SIZE: M6-M20
1/4”-3/4”
GRADE: IS0898-1( 4.8/6.8/8.8)
SAE J429(GR.2/5 )
Our Hex Flange Bolts are designed to provide secure, efficient, and consistent fastening for a wide range of industrial and mechanical applications. Combining a conventional hexagonal drive with an integrated flange beneath the head, these bolts provide a larger bearing surface than standard hex head bolts, helping distribute clamping pressure more evenly across the joint. The integrated flange also eliminates the need for a separate washer in many suitable applications, reducing the number of loose components and helping simplify assembly. This practical design makes hex flange bolts a popular choice for machinery, automotive components, equipment manufacturing, metal fabrication, brackets, frames, and general industrial fastening.
Our Hex Flange Bolts are manufactured from 1035 and 1045 carbon steel, offering practical material options for different fastening requirements. 1035 carbon steel provides a cost-effective solution for general-purpose industrial fastening, while 1045 carbon steel offers a higher-strength material option for applications requiring improved mechanical performance.
Available metric property classes include 4.8, 6.8, and 8.8 according to ISO 898-1, allowing customers to select the appropriate mechanical grade according to the load and service requirements of the application. For inch-series requirements, we also offer SAE J429 Grade 2 and Grade 5, providing flexibility for customers working with North American and imperial fastening systems.
The key advantage of a Hex Flange Bolt is its integrated flange beneath the hexagonal head. The flange creates a broader bearing surface against the mating component, helping distribute the tightening load over a larger area and reducing the need for a separate washer where the application permits.
This integrated configuration can help simplify fastening operations, reduce component count, and improve assembly efficiency. At the same time, the familiar hexagonal head provides straightforward installation using standard wrenches or sockets. For production environments where thousands of fasteners may be installed repeatedly, this combination of integrated bearing surface and easy tool access makes Hex Flange Bolts a practical choice for efficient assembly.
Our Hex Flange Bolts are manufactured according to recognized international specifications, including DIN 6921 and ASME B18.2.1, supporting both metric and inch-series requirements. Standardized specifications help customers maintain dimensional consistency and compatibility with existing nuts, tools, and fastening assemblies. The metric size range covers M6 to M20, while inch sizes range from approximately 1/4" to 3/4".
DIN 6921
ASME B18.2.1
Metric: M6–M20
Inch: ~1/4"–3/4"
To meet different application environments and purchasing requirements, our Hex Flange Bolts are available in Black and Zinc-Plated (ZP) finishes. The availability of two commonly requested finishes gives buyers greater flexibility to balance corrosion protection, appearance, application requirements, and overall cost.
Suitable for many general industrial and machinery applications where a dark surface finish is preferred.
Additional surface protection, widely used for general indoor and light-duty industrial applications.
For OEM manufacturers, machinery producers, automotive suppliers, industrial distributors, hardware wholesalers, and engineering companies, a suitable fastening solution needs to combine performance with sourcing efficiency. Our Hex Flange Bolts bring together 1035 and 1045 carbon steel, ISO 898-1 grades 4.8/6.8/8.8, SAE J429 Grades 2/5, DIN 6921 and ASME B18.2.1 specifications, M6–M20 and 1/4"–3/4" sizes, and Black or Zinc-Plated finishes in one standardized product range.
Whether you need general-purpose hex flange bolts for equipment assembly, Grade 8.8 fasteners for higher-strength mechanical applications, or zinc-plated flange bolts for everyday industrial use, this range provides a practical solution for different fastening requirements — helping simplify assembly while delivering dependable and repeatable fastening performance for industrial and commercial buyers.
