Wholesale DIN 7349:1974 Heavy Flat Washer

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DIN 7349:1974 Heavy Flat Washer

DIN 7349:1974 Heavy Flat Washer for bolts with heavy clamping sleeves is used in connections requiring high bearing capacity and compensation for larger clearances. Compared with a standard flat washer, it places greater emphasis on load support and seating stability, protecting the connected surface under high clamping force.

It is commonly used in heavy equipment, steel structures, construction machinery, clamping-sleeve connections, and bolt assemblies requiring a reinforced bearing surface. The thicker or wider bearing area helps improve load distribution and reduces localized damage from the bolt head or nut.

Material and surface finish can be matched to bolt size, load class, and environmental requirements, making it suitable for improving joint reliability under high load, vibration, or outdoor service conditions.

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Dimensions unit: mm

Nominal diameter d

3.2

4.3

5.3

6.4

8.4

10.5

13

15

17

19

21

23

25

28

31

dc

9

12

15

17

21

25

30

36

40

44

44

50

50

60

68

h

1

1.6

2

3

4

4

6

6

6

8

8

8

10

10

10

Weight per thousand pieces (steel)≈kg

0.436

1.24

2.43

4.59

9.15

12.7

27.1

39.6

48.5

77.4

73.4

97.1

116

174

226

Applicable bolt specifications

3

4

5

6

8

10

12

14

16

18

20

22

24

27

30

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 7349:1974 Heavy Flat 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 7349:1974 Heavy Flat 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 7349:1974 Heavy Flat 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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