Product Specifications

Product Introduction

Heavy hex nuts are built specifically for high-strength structural bolting, especially in steel structures where you need a reliable clamp. They've got a large across-flats dimension and a sturdy hex profile, and they're designed to mate with matching structural bolt assemblies. They're made of carbon steel, with a range of sizes, property classes, and surface finishes, so they can cover different industrial and project requirements.

Material & Mechanical Properties

Manufactured from carbon steel, DIN 6915 heavy hex nuts are available in property classes 8 and 10, depending on the specified product requirements. Mechanical properties are determined according to the applicable standard and material specifications. These nuts are designed to provide reliable fastening performance when correctly matched with compatible bolts and installed in accordance with the relevant requirements.

Dimensional Specifications & Thread

• Thread Sizes: Common sizes include M12 to M36; other specifications may be available upon request.

• Nut Height (m): Dimensions according to the applicable DIN 6915 specification and nominal thread size.

• Width Across Flats (s): Large across-flats dimensions designed for heavy hex structural applications.

• Thread Tolerance: 6H for standard applications; 6AZ may be specified for hot-dip galvanized nuts, where applicable.

• Mating Bolt: Compatible bolts should be selected according to the applicable structural bolting system and assembly requirements.

Surface Finish & Lubrication

DIN 6915 heavy hex nuts can be supplied with different surface finishes according to customer requirements, including black oxide, plain finish, and other specified coatings. Lubrication and coating requirements should be selected according to the intended application and the requirements of the mating bolting assembly. For preloaded structural connections, the specified friction conditions must be maintained to achieve the required installation performance.

System HV Assembly & Compliance

DIN 6915 nuts are associated with high-strength structural bolting assemblies using compatible bolts and washers. A typical HV assembly includes:

• Bolt: DIN 6914 or the applicable EN 14399 structural bolting specification.

• Nut: DIN 6915 heavy hex nut, with the specified property class.

• Washers: Compatible structural washers according to the applicable assembly specification.

For projects requiring compliance with EN 14399, the complete assembly must meet the applicable requirements for component compatibility, mechanical performance, traceability, and conformity assessment. Inspection documents and material certificates can be provided according to the product specification and order requirements.

Application Suitability

DIN 6915 heavy hex nuts are used in structural steel connections, bridges, industrial facilities, steel frames, and other heavy-duty fastening applications. They are suitable for projects requiring robust fastening components and reliable clamping performance. Custom sizes, property classes, and surface finishes are available to meet specific customer and project requirements.