DIN6923 High Strength Hex Flange Nut Class 10.9 and 12.9, Carbon Steel and Stainless Steel Metric Self-Locking Nut

This DIN6923 high‑strength hex flange nut is designed for metric fastening applications in heavy industry, automotive assembly, machinery, retail hardware and general industrial production. The integrated flange base increases the contact area between the nut and the connected surface, helping distribute clamping pressure during assembly.

The product is identified as a hex flange nut and self‑locking nut. The listed model is 6923, with ISO/DIN shown as the standard information. The product uses a metric measuring system and is available in metric thread sizes including M6, M8, M10, M12, M14, M16, M18, M20 and M22, with additional sizes available according to customer requirements.

Specification Table

Surface Treatment Options

Zinc Plating

The zinc‑plated finish provides a bright metallic appearance and is suitable for general industrial and automotive fastening. It can be used where a zinc surface is required for appearance and general environmental protection.

Blackened Finish

The blackened finish provides a dark appearance and is suitable for machinery, automotive components and industrial assemblies where black hardware is preferred.

Passivation

Passivation can be selected for suitable stainless steel applications where improved surface stability and corrosion resistance are required.

HDZ Finish

HDZ refers to a heavy‑duty zinc surface treatment option listed for the product. It can be considered for assemblies requiring increased surface protection. The exact process and coating specification should be selected according to the material and order requirements.

Application

DIN6923 hex flange nuts can be used in a variety of fastening applications, including:

• Heavy industrial machinery
• Automotive components
• Equipment assembly
• Steel structure connections
• Industrial frame installation
• Mechanical maintenance
• Production line equipment
• Agricultural machinery
• General hardware distribution
• Machinery brackets and supports
• High‑strength metric fastening systems
• Industrial repair and replacement work

The integrated flange helps spread the tightening load over a larger surface area than a standard hex nut. This can be useful when the connected surface requires improved load distribution or when assembly space is limited.

For high‑load applications, the nut should be matched with a compatible bolt grade, thread size, material and surface treatment. The selected grade should also be suitable for the working environment and required tightening torque.

Matching Fasteners

The nut and bolt should use the same nominal thread size and compatible thread pitch. The bolt or stud grade should be selected to match the required class of the nut, particularly for class 10.9 and 12.9 fastening systems.

Because the nut includes an integrated flange, a separate flat washer may not be required in every application. Spring washers, locking washers or additional locking components can be used when required by the assembly design.

Packing & Delivery

The product is listed with carton and plastic bag packaging. Pallet packing can be arranged for bulk industrial orders. The reference packaging information is 30 × 40 × 30 cm, with a reference gross weight of 1 kg.

The product description lists:

• Minimum order quantity: 1 ton
• Packaging: bags, cartons and pallets
• Delivery time: approximately 5‑30 days
• Available shipping ports: Tianjin, Qingdao, Shanghai and Ningbo
• Payment options: T/T and L/C
• Production capacity: approximately 500 tons per month

Delivery time may vary according to the selected material, strength class, thread size, surface treatment, packaging method and order quantity.

FAQ

Q1: What type of nut is this?

It is a DIN6923 hex flange nut and self‑locking nut.

Q2: What material options are available?

The page lists carbon steel, steel, alloy and other material options. The detailed material field lists carbon steel and stainless steel.

Q3: What strength classes are available?

The listed strength classes are 10.9 and 12.9. The detailed product attributes also identify grade 12.9.

Q4: What standard does the product follow?

The product information lists ISO/DIN, and the model is 6923.

Q5: What thread sizes are available?

Displayed metric sizes include M6, M8, M10, M12, M14, M16, M18, M20 and M22, with additional sizes available according to customer requirements.

Q6: What surface treatments are available?

The listed surface treatments include zinc plating, blackening, passivation and HDZ.

Q7: Can a flat washer be used with this flange nut?

The integrated flange provides a wider bearing surface, so a flat washer may not be required in every assembly. The final washer selection should follow the equipment design and installation requirements.

Q8: Which bolts are suitable for this nut?

Use metric bolts, screws or threaded studs with the same nominal thread size and a compatible strength grade.

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