NEW Clock Mainspring - Hole End

This is for one brand new hole end mainspring. Please carefully read the chart below so you can select the corresponding ITEM number for the size you need in the drop down menu above.

WIDTH

  Inches               MM

STRENGTH

    Inches                 MM

LENGTH

Inches

ITEM NO.

3/32

2.3

.007

0.18

18

MS-100

5/32

4.0

.008

0.20

24

MS-101

5/32

4.0

.011

0.28

28.5

MS-103

3/16

4.8

.009

0.23

24

MS-104

7/32

5.6

.008

0.20

26

MS-105

7/32

5.6

.0095

0.24

24

MS-106

1/4

6.4

.010

0.25

24

MS-109

1/4

6.4

.011

0.28

39

MS-110

9/32

7.0

.007

0.18

44

MS-111

9/32

7.0

.010

0.25

18

MS-112

9/32

7.0

.010

0.25

39-1/2

MS-113

5/16

8.0

.008

0.20

27

MS-114

5/16

8.0

.010

0.25

28

MS-116

5/16

8.0

.010

0.25

32

MS-117

5/16

8.0

.010

0.25

39.5

MS-118

5/16

8.0

.011

0.28

45-1/4

MS-119

5/16

8.0

.015

0.38

40

MS-120

5/16

8.0

.016

0.41

54

MS-121

11/32

8.7

.013

0.33

66

MS-122

23/64

9.0

.011

0.28

45-1/2

MS-124

23/64

9.0

.0125

0.32

18-1/2

MS-125

3/8

9.5

.011

0.28

48

MS-126

3/8

9.5

.014

0.36

48

MS-127

3/8

9.5

.017

0.43

54

MS-128

25/64

10.0

.011

0.28

45-1/4

MS-130

25/64

10.0

.012

0.30

73

MS-131

7/16

11.0

.010

0.25

32-1/4

MS-132

7/16

11.0

.011

0.28

49

MS-135

7/16

11.0

.0155

0.40

55-1/2

MS-136

15/32

12.0

.010

0.25

39-1/2

MS-137

15/32

12.0

.012

0.30

53

MS-139

15/32

12.0

.014

0.36

72

MS-140

1/2

12.7

.012

0.30

48

MS4-1232

1/2

12.7

.013

0.33

(description exceeds maximum possible length)