Wholesale DIN 6331:1991 Hexagon Nut

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DIN 6331:1991 Hexagon Nut

DIN 6331:1991 Nut with integrated bearing surface provides washer-like support during assembly. Its design helps distribute load, improve contact stability, and reduce the need for a separate washer in selected applications.

This product is suitable for fixtures, tooling, machine-tool accessories, metal brackets, and equipment connections, especially where frequent removal or a more stable bearing face is required. The hex exterior allows operation with standard tools and improves installation efficiency on site.

Strength class, material, and surface finish options can be selected according to service conditions to meet requirements for wear resistance, corrosion protection, and repeated assembly.

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Dimensions unit: mm

Thread size d M6 M8 M10 M12 M16 M20 M24 M27 M30 M36 M42 M48
P Pitch 1 1.25 1.5 1.75 2 2.5 3 3 3.5 4 4.5 5
a Nominal 3 3.5 4 4 5 6 6 7 8 10 12 14
Max. 3.125 3.65 4.15 4.15 5.15 6.15 6.15 7.18 8.18 10.18 12.215 14.215
Min. 2.875 3.35 3.85 3.85 4.85 5.85 5.85 6.82 7.82 9.82 11.785 13.785
d1 Max. 14 18 22 25 31 37 45 50 58 68 80 92
Min. 13.73 17.73 21.67 24.67 30.61 36.61 44.61 49.61 57.54 67.54 79.54 91.46
da Min. 6 8 10 12 16 20 24 27 30 36 42 48
Max. 6.75 8.75 10.8 13 17.3 21.6 25.9 29.1 32.4 38.9 45.4 51.8
e Min. 11.05 14.38 17.77 20.03 26.75 33.53 39.98 45.63 51.28 61.31 72.61 53.91
m Nominal 9 12 15 18 24 30 36 40 45 54 63 72
Max. 9.29 12.35 15.35 18.35 24.42 30.42 36.5 40.5 45.5 54.6 63.6 72.6
Min. 8.71 11.65 14.65 17.65 23.58 29.58 35.5 39.5 44.5 53.4 62.4 71.4
s Max. 10 13 16 18 24 30 36 41 46 55 65 75
Min. 9.78 12.73 15.73 17.73 23.67 29.67 35.38 40.38 45.38 54.26 64.26 74.26
r Max. 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Weight per thousand pieces (steel)≈kg  5 12.4 25.5 36.5 71 135 230 320 470 810 1340 2040

FAQ

Frequently Asked Questions

  • 1. How soon can I expect a reply after sending an inquiry?

    A: We take every inquiry seriously. On working days, we will respond within 12 hours after receiving your inquiry.

  • 2. What products do you mainly offer?

    A: We focus on the production of fasteners made of carbon steel, stainless steel, and low-alloy steel. We are a direct manufacturer with independent production capacity. DIN 6331:1991 Hexagon Nut Factory. We own several fastener manufacturing facilities and have an international sales department, providing full-process services from production to export.

  • 3. Do you support customized production?

    A: Customized production is our core business. We can develop and manufacture products based on the drawings or samples you provide.

  • 4. Do you produce standard parts?

    A: Yes. In addition to custom products, we also produce general construction machinery parts (GET parts) for equipment such as excavators, including bucket teeth, tooth holders, corner blades, pins, clips, bolts and nuts. DIN 6331:1991 Hexagon Nut Wholesale.

  • 5. What is your production capacity?

    A: We have 12 energy-efficient and environmentally friendly modern production lines (including one fully automatic shell molding line and four heat treatment lines), with an annual production capacity exceeding 20,000 tons, enabling us to steadily meet various order requirements.

  • 6. What are your payment terms?

    A: Trade terms (such as FOB, CIF, etc.) are confirmed when quoting. For batch production, we typically require a 30% deposit, with the balance paid against the copy of the bill of lading. T/T is the main payment method accepted, and L/C can also be negotiated.

  • 7. How is the shipment arranged?

    A: We are only 35 km away from Shanghai Port and Ningbo Port, so sea freight is the main mode of transportation, which is convenient and efficient. For urgent deliveries, we can also arrange air freight via Ningbo or Shanghai airports.

Better Fastener Industry Co., Ltd.

About Us

BETTER FASTENER INDUSTRY CO., LTD.

Better Fastener is a professional fastener enterprise specializing in the manufacturing of steel washers, stainless steel washers, spring washers and sealingwashers. Founded in 2001 as a washer factory, the company expanded into a comprehensive enterprise integrating washers, nuts, bolts, spring nuts and other fastener products in 2010. DIN 6331:1991 Hexagon Nut Suppliers in China.

The company positions itself as a provider of comprehensive one-stop services for customers, relying on technological R&D, industrial investment and trade distribution.

With an experienced professional team and a sound sales network, Better Fastener has achieved excellent sales performance in both domestic and foreign markets,and has grown into one of the competitive manufacturers and suppliers in China's industrial fastener industry.

Better Fastener is committed to becoming a trusted fastener supplier for customers with reliable product quality, reasonable prices and on-time delivery

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