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AGARWAL SONS

House of Fasteners, Hand Tools & General Hardware

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SPRING WASHERS

Square section Spring Washer
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FLAT (RECTANGULAR) SECTION SPRING WASHERS

 

Spring washers are made out of spring steel and are hardened to HV 430 to 530 and are used along with almost every externally threaded fastener.

 

Flat (Rectangular) and Square sections are the generally used types of spring washers. Square section spring washers are used for use with fasteners with cylindrical heads and Flat section spring washers are used for all other types of heads. Spring washers of square section are lighter, and thereby, cheaper than the ones with a rectangular section.   

 

These washers are normally available in Black finish. Other finishes like zinc coated (with hydrogen de-embrittlement) in Blue or Yellow passivation, Cadmium Plated, Nickle Plated, Bright Chromium plated and Phosphated are also available.

 

Size Range


Flat (Rectangular) Section

  • 3 to 52 in MM series generally conforming to IS 3063-1994 and DIN 127
  • 1/8” to 2” in inch series generally conforming to BS 1802-1951

Square Section

  • 3 to 52 in MM series generally conforming to IS 6735-1994 din 7980
  • 1/8” to 2” in inch series generally conforming to BS 1802-1951

 

IMPORTANT DIMENSIONS OF SPRING WASHERS

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SPRING WASHERS - FLAT (RECTANGULAR) SECTION CONFORMING TO IS 3063-1994

                                                                                                                                                                               All dimensions in mm

NOM SIZE

Inner Dia (d)

Basic           Tol (+)

Outer Dia (d1) Max

WIDTH (b)

  Basic        Tol (+ or -)

THICKNESS (S)

      Basic    Tol (+ or -)

Weight per 1000 in Kgs

3

3.1

0.3

6.2

1.3

0.1

0.8

0.1

0.11

4

4.1

0.3

7.6

1.5

0.1

0.9

0.1

0.18

5

5.1

0.3

9.2

1.8

0.1

1.2

0.1

0.36

6

6.1

0.4

11.8

2.5

0.15

1.6

0.1

0.83

8

8.1

0.4

14.8

3

0.15

2

0.1

1.60

10

10.2

0.5

18.1

3.5

0.2

2.2

0.15

2.53

12

12.2

0.5

21.1

4

0.2

2.5

0.15

3.82

14

14.2

0.5

24.1

4.5

0.2

3

0.15

6.01

16

16.2

0.8

27.4

5

0.2

3.5

0.2

8.91

18

18.2

0.8

29.4

5

0.2

3.5

0.2

9.73

20

20.2

1

33.6

6

0.2

4

0.2

15.20

22

22.5

1

35.9

6

0.2

4

0.2

16.50

24

24.5

1

40

7

0.25

5

0.2

26.20

27

27.5

1

43

7

0.25

5

0.2

28.70

30

30.5

1.2

48.2

8

0.25

6

0.2

44.30

33

33.5

1.2

55.2

10

0.25

6

0.2

63.00

36

36.5

1.2

58.2

10

0.25

6

0.2

67.30

39

39.5

1.2

61.2

10

0.25

6

0.2

71.70

42

42.5

1.2

68.2

12

0.25

7

0.25

111.00

45

45.5

1.2

71.2

12

0.25

7

0.25

117.00

48

49

1.5

75

12

0.25

7

0.25

123.00

52

53

1.5

83

14

0.25

8

0.25

182.00

SPRING WASHERS - SQUARE SECTION CONFORMING TO IS 6735-1972

                                                                                                                                                                     All dimensions in mm

NOM SIZE

Inner Dia (d)

Basic           Tol (+)

Outer Dia  (d1) Max

WIDTH (b) = THICKNESS(s)

  Basic        Tol (+ or -)

Weight per 1000 IN KGS

3

3.1

0.3

5.6

1

0.1

0.105

4

4.1

0.3

7

1.2

0.1

0.195

5

5.1

0.3

8.8

1.6

0.1

0.370

6

6.1

0.4

9.9

1.6

0.1

0.425

8

8.1

0.4

12.7

2

0.1

1.05

10

10.2

0.5

16

2.5

0.15

1.96

12

12.2

0.5

18

2.5

0.15

2.28

14

14.2

0.5

21.1

3

0.2

3.8

16

16.2

0.8

24.4

3.5

0.2

5.94

18

18.2

0.8

26.4

3.5

0.2

6.6

20

20.2

1

30.6

4.5

0.2

12.3

22

22.5

1

32.9

4.5

0.2

13.6

24

24.5

1

35.9

5

0.2

18.1

27

27.5

1

38.9

5

0.2

20.6

30

30.5

1.2

44.1

6

0.2

32

33

33.5

1.2

47.2

6

0.2

35

36

36.5

1.2

52.2

7

0.25

52.5

39

39.5

1.2

55.2

7

0.25

56.1

42

42.5

1.2

60.2

8

0.25

80

45

45.5

1.2

64

8

0.25

85.3

48

49

1.5

67

8

0.25

90

SPRING WASHERS FLAT AND SQUARE SECTION AS PER BSS 1802-1951

                                                                                                                                                                              All dimensions in mm

SIZE IN

INCHES

SIZE IN

MM

FLAT SECTION

WIDTH X THICKNESS

SQUARE SECTION

WIDTH AND THICKNESS

1/8”

3.18

1.2 X 0.8

-

5/32”

3.97

1.6 X 0.8

-

3/16”

4.76

2.3 X 1.2

1.6

¼”

6.35

2.3 X 1.6

1.8

5/16”

7.94

3.3 X 1.6

2

3/8”

9.53

3.7 X 1.6

2.3

7/16”

11.11

4.1 X 1.6

2.6

½”

12.70

4.1 X 2.3

3

9/16”

14.29

4.9 X 2.3

3.3

5/8”

15.88

4.9 X 3.3

3.7

¾”

19.05

5.9 X 3.3

4.5

7/8”

22.23

6.4 X 3.3

5.4

1”

25.40

7.1 X 4.7

5.9