products

Home / Products / Washers / Rings / DIN 471 (-1):2011 External Fastener

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.

Contact Us
PREV：No previous product NEXT：DIN 984:2021 Internal Retaining Ring

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. 

OUR PRODUCTS

Related Products

Better Fastener Industry Co., Ltd.

ABOUT US

Hangzhou Better Fastener
Technology Limited

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.

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

OUR CERTIFICATE

Certificate Of Honour

  • Certificate
  • Certificate
  • Certificate
  • Certificate
  • Certificate
  • Certificate

NEWS

Latest News

  • What is a Screw?

    A screw is a fastening tool that utilizes the principle of an inclined spiral plane to join or secure objects together. Its core structure consists of a cylindrical body with continuous threads (like spiral ridges), typically featuring a head at one end for convenient rotation. When turned, the rotational motion is con...

    READ MORE +
  • What is a Nuts?

    Now that we've covered bolts, their "perfect partner" — the nut — is much easier to understand. Simply put, a nut is a small metal block or disc with a round hole in the center and internal threads on the wall of that hole. Its core function is to work with an externally threaded bolt to clamp two or more components to...

    READ MORE +
  • What is a Washers?

    Simply put, a washer is a thin, disc-shaped ring with a central hole, typically made of metal (such as carbon steel, stainless steel, or copper) or non-metallic materials (such as rubber, plastic, or asbestos). It is placed between the head of a bolt/nut and the surface of the workpiece, or at the junction between the ...

    READ MORE +
  • What is a Bolt?

    Simply put, a bolt is a cylindrical fastener with external threads. It works with a matching nut or is screwed directly into a threaded hole of the mating part to firmly hold two or more components together. To put it intuitively, think of it as a "metal nail." However, unlike a nail that is driven in with a hammer, a ...

    READ MORE +
X Facebook
Products News