Wholesale DIN 440:2024 Wood Construction Square Hole Washer

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DIN 440:2024 Wood Construction Square Hole Washer

DIN 440:2024 Wood Construction Square Hole Washer is used in bolted joints for wooden beams, posts, and structural timber connections. The square hole can mate with square-neck bolts or special fasteners to help prevent rotation while providing a larger bearing area.

This washer is suitable for timber buildings, bridge decking components, landscape facilities, wooden supports, and heavy timber assemblies. Compared with a small-diameter washer, the square or enlarged bearing surface reduces the risk of crushing wood fibers and improves joint stability.

Different sizes and coatings can be selected according to timber thickness, bolt specification, and outdoor corrosion requirements, supporting structural fixing, repair reinforcement, and long-term exposed service.

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Dimensions unit: mm

Applicable thread

M5

M6

M8

M10

M12

M16

M20

M22

a

Min.=Nominal

5.5

6.6

9

11

14

18

22

24

Max.

5.8

6.96

9.36

11.43

14.43

18.7

22.84

24.84

dc

Max.=Nominal

18

22

28

34

44

56

72

80

Min.

16.9

20.7

26.7

32.4

42.4

54.1

70.1

78.1

h

Nominal

2

2

3

3

4

5

6

6

Max.

2.3

2.3

3.6

3.6

4.6

6

7

7

Min.

1.7

1.7

2.4

2.4

3.4

4

5

5

Weight per thousand pieces (steel)≈kg

3.52

5.28

12.6

18.5

41.6

84

169

210

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 440:2024 Wood Construction Square Hole Washer 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 440:2024 Wood Construction Square Hole Washer 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 440:2024 Wood Construction Square Hole Washer 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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