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DIN 125-1:1990 Grade A Assembly 250HV below Flat Washer

DIN 125-1:1990 Grade A Flat Washer with hardness up to 250HV is used for bearing and separation in standard bolt-and-nut assemblies. The flat circular surface distributes pressure from the nut or bolt head and helps reduce surface indentation on the connected part.

This washer is suitable for machinery, auxiliary steel connections, assembly surface protection, and general engineering fastening. Grade A dimensional control supports applications requiring consistent outside diameter, inside diameter, and thickness, while the hardness range is appropriate for medium-to-light loads or ordinary material surfaces.

It can be used with hex bolts, hex nuts, and other standard fasteners, with zinc plating, stainless steel, or other finishes available to improve rust resistance and appearance consistency according to the service environment.

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Dimensions unit: mm

Specification

Φ1.7

Φ1.8

Φ2.2

Φ2.5

Φ2.7

Φ2.8

Φ3.2

Φ3.7

Φ4.3

Φ5.3

Φ6.4

Φ7.4

Φ8.4

Φ10.5

Φ13

Φ15

M

Corresponding bolt specifications

M1.6

M1.7

M2

M2.3

M2.5

M2.6

M3

M3.5

M4

M5

M6

M7

M8

M10

M12

M14

d

Min.=Nominal

1.7

1.8

2.2

2.5

2.7

2.8

3.2

3.7

4.3

5.3

6.4

7.4

8.4

10.5

13

15

Max.

1.84

1.94

2.34

2.64

2.84

2.94

3.38

3.88

4.48

5.48

6.62

7.62

8.62

10.77

13.27

15.27

dG

Max.=Nominal

4

4.5

5

6

6

7

7

8

9

10

12

14

16

20

24

28

Min.

3.70

4.20

4.70

5.70

5.70

6.64

6.64

7.64

8.64

9.64

11.57

13.57

15.57

19.48

23.48

27.48

h

Nominal

0.3

0.3

0.3

0.5

0.5

0.5

0.5

0.5

0.8

1

1.6

1.6

1.6

2

2.5

2.5

Max.

0.35

0.35

0.35

0.55

0.55

0.55

0.55

0.55

0.9

1.1

1.8

1.8

1.8

2.2

2.7

2.7

Min.

0.25

0.25

0.25

0.45

0.45

0.45

0.45

0.45

0.7

0.9

1.4

1.4

1.4

1.8

2.3

2.3

Thousand piece weight (steel)≈kg

0.024

0.031

0.037

0.092

0.088

0.127

0.119

0.155

0.308

0.443

1.02

1.39

1.83

3.57

6.27

8.62

 

Specification

Φ17

Φ19

Φ21

Φ23

Φ25

Φ27

Φ28

Φ29

Φ31

Φ33

Φ34

Φ36

Φ37

Φ39

Φ40

Φ41

M

Corresponding bolt specifications

M16

M18

M20

M22

M24

M26

M27

M28

M30

M32

M33

M35

M36

M38

M39

M40

d

Min.=Nominal

17

19

21

23

25

27

28

29

31

33

34

36

37

39

40

41

Max.

17.27

19.33

21.33

23.33

25.33

27.33

28.33

29.33

31.39

33.62

34.62

36.62

37.62

39.62

40.62

41.62

dc

Max.=Nominal

30

34

37

39

44

50

50

50

56

60

60

66

66

72

72

72

Min.

29.48

33.38

36.38

38.38

43.38

49.38

49.38

49.38

55.26

58.80

58.80

64.80

64.80

70.80

70.80

70.80

h

Nominal

3

3

3

3

4

4

4

4

4

5

5

5

5

6

6

6

Max.

3.3

3.3

3.3

3.3

4.3

4.3

4.3

4.3

4.3

5.6

5.6

5.6

5.6

6.6

6.6

6.6

Min.

2.7

2.7

2.7

2.7

3.7

3.7

3.7

3.7

3.7

4.4

4.4

4.4

4.4

5.4

5.4

5.4

Thousand piece weight (steel)≈kg

11.3

14.7

17.2

18.3

32.3

43.7

42.3

40.9

53.6

77.4

75.3

94.3

92.1

136

133

130

 

Specification

Φ43

Φ46

Φ50

Φ52

Φ54

Φ57

Φ58

Φ60

Φ62

Φ66

Φ70

Φ74

Φ78

Φ82

Φ87

Φ93

M

Corresponding bolt specifications

M42

M45

M48

M50

M52

M55

M56

M58

M60

M64

M68

M72

M76

M80

M85

M90

d

Min.=Nominal

43

46

50

52

54

57

58

60

62

66

70

74

78

82

87

93

Max.

43.62

46.62

50.62

52.74

54.74

57.74

58.74

60.74

62.74

66.74

70.74

74.74

78.74

82.87

87.87

93.87

dc

Max.=Nominal

78

85

92

92

98

105

105

110

110

115

120

125

135

140

145

160

Min.

76.80

83.60

90.60

90.60

96.60

103.60

103.60

108.60

108.60

113.60

118.60

123.40

133.40

138.40

143.40

158.40

h

Nominal

7

7

8

8

8

9

9

9

9

9

10

10

10

12

12

12

Max.

8

8

9

9

9

10

10

10

10

10

11

11

11

13.2

13.2

13.2

Min.

6

6

7

7

7

8

8

8

8

8

9

9

9

10.8

10.8

10.8

Thousand piece weight (steel)≈kg

183

220

294

284

330

431

425

472

458

492

586

626

749

953

996

1250

 

Specification

Φ98

Φ104

Φ109

Φ114

Φ119

Φ124

Φ129

Φ134

Φ139

Φ144

Φ149

Φ155

Φ165

M

Corresponding bolt specifications

M95

M100

M105

M110

M115

M120

M125

M130

M135

M140

M145

M150

M160

d

Min.=Nominal

98

104

109

114

119

124

129

134

139

144

149

155

165

Max.

98.87

104.87

109.87

114.87

119.87

125

130

135

140

145

150

156

166

dc

Max.=Nominal

165

175

180

185

200

210

220

220

230

240

250

250

250

Min.

163.40

173.40

178.40

183.15

198.15*

208.15

218.15

218.15

228.15

238.15

248.15

248.15

248.15

h

Nominal

12

14

14

14

14

16

16

16

16

18

18

18

18

Max.

13.2

15.2

15.2

15.2

15.2

17.2

17.2

17.2

17.2

19.2

19.2

19.2

19.2

Min.

10.8

12.8

12.8

12.8

12.8

14.8

14.8

14.8

14.8

16.8

16.8

16.8

16.8

Thousand piece weight (steel) ≈kg

1300

1710

1770

1830

2230

2830

3130

3000

3310

4090

4470

4270

3910

① In the original standard text, the corresponding dc minimum value of Φ119 is 188.15, but the corresponding deviation here should be 1.85mm, that is, the actual minimum value is 200-1.85=198.15 mm. (DIN522 stipulates that when h is less than 4 and the product grade is A, the dimensional tolerance of d2 is h15, and when dc is 200mm, the corresponding deviation is 1.85mm).

② Material:

1) Steel hardness grade 140HV, hardness HV140-250; hardness grade 200HV, hardness HV200-250

2) Stainless steel, hardness grade 140HV, hardness HV140-250; hardness grade 200HV, hardness HV200-250; stainless steel groups A2 and A4, F1, C1 and C4

3) According to the agreement, the gasket can be made of non-ferrous metal or other materials

4) When h does not exceed 0.5 mm, the hardness grade is HV 2. When h exceeds 0.5 mm, the hardness grade is HV 10. (See original technical conditions) 

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