Wholesale DIN 471 (-1):2011 External Fastener

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DIN 471 (-1):2011 External Fastener

DIN 471 (-1):2011 External Retaining Ring is installed in a groove on a shaft to provide axial positioning and retention. The external ring forms a reliable shoulder on shaft components, preventing bearings, gears, washers, or sleeves from moving axially.

It is commonly used in motors, gear reducers, transmission shafts, pumps, automotive components, and general machinery. Compared with threaded locking components, a retaining ring offers compact installation and is suitable for axial retention designs requiring limited space and quick assembly or removal.

The proper size should be selected according to shaft diameter, groove dimensions, spring material, and corrosion-resistance requirements to maintain stable retaining performance during rotation, vibration, and maintenance disassembly.

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Dimensions unit: mm

Nominal diameter d

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

s

Max.

0.4

0.4

0.6

0.7

0.8

0.8

1

1

1

1

1

1

1

1

1

Min.

0.35

0.35

0.55

0.65

0.75

0.75

0.94

0.94

0.94

0.94

0.94

0.94

0.94

0.94

0.94

d3

Max.

2.74

3.74

4.74

5.64

6.56

7.46

8.46

9.4

10.3

11.1

12

13

13.9

14.8

15.8

Min.

2.55

3.55

4.55

5.45

6.32

7.22

8.22

8.94

9.84

10.64

11.54

12.54

13.44

14.34

15.34

d5

Min.

1

1

1

1.2

1.2

1.2

1.2

1.5

1.5

1.7

1.7

1.7

1.7

1.7

1.7

a

Max.

1.9

2.2

2.5

2.7

3.1

3.2

3.3

3.3

3.3

3.3

3.4

3.5

3.6

3.7

3.8

n

≈

0.8

0.9

1.1

1.3

1.4

1.5

1.7

1.8

1.8

1.8

2

2.1

2.2

2.2

2.3

Weight per thousand pieces (steel)≈kg

0.017

0.022

0.066

0.084

0.121

0.158

0.3

0.34

0.41

0.5

0.53

0.64

0.67

0.7

0.82

 

Nominal diameter d

18

19

20

21

22

24

25

26

28

29

30

32

34

35

36

s

Max.

1.2

1.2

1.2

1.2

1.2

1.2

1.2

1.2

1.5

1.5

1.5

1.5

1.5

1.5

1.75

Min.

1.14

1.14

1.14

1.14

1.14

1.14

1.14

1.14

1.44

1.44

1.44

1.44

1.44

1.44

1.69

d3

Max.

16.6

17.6

18.63

19.63

20.63

22.41

23.41

24.41

26.11

27.11

28.11

29.81

31.75

32.45

33.45

Min.

16.14

17.14

18.08

19.08

20.08

21.78

22.78

23.78

25.48

26.48

27.48

29.18

31

31.7

32.7

d5

Min.

2

2

2

2

2

2

2

2

2

2

2

2.5

2.5

2.5

2.5

a

Max.

3.9

3.9

4

4.1

4.2

4.4

4.4

4.5

4.7

4.8

5

5.2

5.4

5.6

5.6

n

≈

2.4

2.5

2.6

2.7

2.8

3

3

3.1

3.2

3.4

3.5

3.6

3.8

3.9

4

Weight per thousand pieces (steel)≈kg

1.11

1.22

1.3

1.42

1.5

1.77

1.9

1.96

2.92

3.2

3.31

3.54

3.8

4

5

 

Nominal diameter d

38

40

42

45

48

50

52

55

56

58

60

62

63

65

68

s

Max.

1.75

1.75

1.75

1.75

1.75

2

2

2

2

2

2

2

2

2.5

2.5

Min.

1.69

1.69

1.69

1.69

1.69

1.93

1.93

1.93

1.93

1.93

1.93

1.93

1.93

2.43

2.43

d3

Max.

35.45

36.89

38.89

41.89

44.89

46.19

48.19

51.26

52.26

54.26

56.26

58.26

59.26

61.26

63.96

Min.

34.7

35.6

37.6

40.6

43.6

44.9

46.9

49.7

50.7

52.7

54.7

56.7

57.7

59.7

62.4

d5

Min.

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

3

3

a

Max.

5.8

6

6.5

6.7

6.9

6.9

7

7.2

7.3

7.3

7.4

7.5

7.6

7.8

8

n

≈

4.2

4.4

4.5

4.7

5

5.1

5.2

5.4

5.5

5.6

5.8

6

6.2

6.3

6.5

Weight per thousand pieces (steel)≈kg

5.62

6.03

6.5

7.5

7.9

10.2

11.1

11.4

11.8

12.6

12.9

14.3

15.9

18.2

21.8

 

Nominal diameter d

70

72

75

78

80

82

85

88

90

95

100

105

110

115

120

s

Max.

2.5

2.5

2.5

2.5

2.5

2.5

3

3

3

3

3

4

4

4

4

Min.

2.43

2.43

2.43

2.43

2.43

2.43

2.92

2.92

2.92

2.92

2.92

3.9

3.9

3.9

3.9

d3

Max.

65.96

67.96

70.96

73.96

74.96

76.96

79.96

83.04

85.04

90.04

95.04

98.54

103.54

108.54

113.54

Min.

64.4

66.4

69.4

72.4

73.4

75.4

78.4

81.2

83.2

88.2

93.2

96.7

101.7

106.7

111.7

d5

Min.

3

3

3

3

3

3

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

a

Max.

8.1

8.2

8.4

8.6

8.6

8.7

8.7

8.8

8.8

9.4

9.6

9.9

10.1

10.6

11

n

≈

6.6

6.8

7

7.3

7.4

7.6

7.8

8

8.2

8.6

9

9.3

9.6

9.8

10.2

Weight per thousand pieces (steel)≈kg

22

22.5

24.6

26.2

27.3

31.2

36.4

41.2

44.5

49

53.7

80

82

84

86

 

Nominal diameter d

125

130

135

140

145

150

155

160

165

170

175

180

185

190

195

s

Max.

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

Min.

3.9

3.9

3.9

3.9

3.9

3.9

3.9

3.9

3.9

3.9

3.9

3.9

3.9

3.9

3.9

d3

Max.

118.54

123.63

128.63

133.63

138.63

142.63

146.63

151.63

156.13

161.13

166.13

171.03

176.13

181.22

186.22

Min.

116.7

121.5

126.5

131.5

136.5

140.5

144.5

149.5

154

159

164

168.9

174

178.8

183.8

d5

Min.

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

a

Max.

11.4

11.6

11.8

12

12.2

13

13

13.3

13.5

13.5

13.5

14.2

14.2

14.2

14.2

n

≈

10.4

10.7

11

11.2

11.5

11.8

12

12.2

12.5

12.9

12.9

13.5

13.5

14

14

Weight per thousand pieces (steel)≈kg

90

100

104

110

115

120

135

150

160

170

180

190

200

210

220

 

Nominal diameter d

200

210

220

230

240

250

260

270

280

290

300

s

Max.

4

5

5

5

5

5

5

5

5

5

5

Min.

3.9

4.88

4.88

4.88

4.88

4.88

4.88

4.88

4.88

4.88

4.88

d3

Max.

191.22

198.72

208.72

218.72

228.72

238.72

245.72

255.81

265.81

275.81

285.81

Min.

188.8

196.3

206.3

216.3

226.3

236.3

243.3

253

263

273

283

d5

Min.

4

4

4

4

4

4

5

5

5

5

5

a

Max.

14.2

14.2

14.2

14.2

14.2

14.2

16.2

16.2

16.2

16.2

16.2

n

≈

14

14

14

14

14

14

16

16

16

16

16

Weight per thousand pieces (steel)≈kg

230

248

265

290

310

335

355

375

398

418

440

① Hardness requirements:

Shaft diameter d≤48mm, hardness 470-580 HV or 47-54 HRC

48mm＜shaft diameter d≤200mm, hardness 435-530 HV or 44-51 HRC

200mm＜shaft diameter d≤300mm, hardness 390-470 HV or 40-47 HRC.

② Dimension n shall not exceed the maximum value of dimension a. 

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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 471 (-1):2011 External Fastener 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 471 (-1):2011 External Fastener 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 471 (-1):2011 External Fastener 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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