Strain, in pounds, per square inch.

CAST IRON.

WROUGHT IRON.

Length, in feet, to extend one inch.

Length, in feet, to shorten one inch.

Length, in feet, to cither extend or shorten one inch.

1000

1204

1094

2250

2000

583

543

1125

3000

377

360

750

4000

274

269

562

5000

213

214

450

6000

173

177

375

7000

144

151

321

8000

123

132

281

9000

106

117

250

10000

93

104

225

11000

83

94

204

12000

74

86

187

13000

67

79

173

14000

61

73

161

15000

55

68

150

16000

.....

63

141

17000

.....

59

132

18000

.....

56

125

19000

.....

53

118

20000

.....

50

112

21000

.....

47

107

22000

.....

45

102

23000

.....

43

98

24000

.....

41

94

25000

.....

40

90

and BOLT HEADS.

Thickness Rough.

Thickness Finish.

Short

Diameter

Rough.

Short Diameter

Finish.

Long

Diameter

Rough.

Long

Diameter

Rough.

Thickness Rough.

Thickness Finish.

.

1/4 ..

3/16..

1/2..

7/16..

37/67..

7/10..

1/4..

3/16..

5/8.

1/4..

19/32.

17/32.

11/16..

10/12..

19/64..

1/4..

3/8..

5/16..

11/16.

5/8..

51/64.

63/64..

11/32..

5/16..

7/16.

3/8..

25/32.

23/22..

9/10..

1 7/64..

25/64..

3/8..

1/2..

7/16..

7/8..

13/16..

1..

1 15/64..

7/16..

7/16..

9/16..

1/2..

31/32..

29/32..

1 1/8..

1 23/64..

31/64..

1/2..

5/8..

9/16..

1 1/16..

1..

1 7/32..

1 1/2..

17/32..

9/16..

3/4..

11/16..

1 1/4..

1 3/16..

1 7/16..

1 49/64..

5/8..

11/16..

7/8..

13/16..

1 7/16..

1 3/8..

1 21/32..

2 1/32..

23/32..

13/16..

1..

15/16..

1 5/8..

1 9/16..

1 7/8..

2 19/64.

13/16..

15/16..

1 1/8..

1 1/16..

1 13/16..

1 3/4..

2 3/32..

2 9/16..

29/32..

1 1/16..

1 1/4..

1 3/16..

2 ...

1 15/16..

2 5/16..

2 53/64..

1..

1 3/16..

1 3/8..

1 5/16..

2 3/16..

2 1/8..

2 17/32.

3 3/32..

1 3/32..

1 5/16..

1 1/2..

1 7/16..

2 3/8..

25..

2 3/4..

3 23/64..

1 3/16..

1 7/16..

1 5/8..

1 9/16..

2 9/16..

2 1/2 ...

2 31/32.

3 5/8..

1 9/32..

1 9/16..

1 3/4..

1 11/16..

2 3/4..

2 11/16.

3 3/16..

3 57/64..

1 3/8..

1 11/16..

1 7/8..

1 13/16.

2 15/16..

2 7/8..

3 13/32.

4 5/32..

1 15/32..

1 13/16..

2..

1 15/16..

3 1/8..

3 1/16..

3 5/8..

4 27/64..

1 9/16..

1 15/16..

2 1/4..

2 3/16..

3 1/2..

3 7/16..

4 1/16..

4 61/64..

1 3/4..

2 3/16..

2 1/2..

2 7/16..

3 7/8..

3 13/16..

4 1/2..

5 31/64..

1 15/16..

2 7/16..

2 3/4..

2 11/16..

4 1/4..

4/3/16..

4 29/32..

6..

2 1/8...

2 11/16..

3 ...

2 15/16.

4 5/8..

4 9/16..

5 3/8..

6 17/32..

2 5/16..

2 15/16..

3 1/4..

3 3/16..

5 ...

4 15/16..

5 13/16.

7 1/16..

2 1/2..

3 3/16..

3 1/2..

3 7/16..

5 3/8 ...

5 5/16..

6 7/64..

7 39/64..

2 11/16..

3 7/16..

3 3/8..

3 13/16..

5 3/4..

5 11/16..

6 21/32..

8 1/8...

2 7/8..

3 13/16..

4 ...

3 15/16..

6 1/8 ...

6 1/16..

7 3/32..

8 41/64..

3 1/16..

3 15/16..

4 1/4..

4 3/16..

6 1/2 ...

6 7/16..

7 9/16..

9 3/16..

3 1/4..

4 3/16..

4 1/2..

4 7/16..

6 7/8 ...

6 13/16.

7 31/32..

9 3/4..

3 7/16..

4 7/16..

4 3/4..

4 11/16.

7 1/4 ...

7 3/16..

8 13/32..

10 1/4..

3 5/8..

4 11/16..

5 ...

4 15/16.

7 5/8..

7 9/16..

8 27/32..

10 49/68..

3 13/16..

4 15/16..

5 1/4 ...

5 3/16..

8 ...

7 15/16.

9 9/32..

11 23/64..

4..

5 3/16..

5 1/2..

5 7/16..

8 3/8 ...

8 5/16..

9 23/32..

11 7/8..

4 3/16..

5 7/16..

5 3/4 ...

5 11/16..

8 3/4 ...

8 11/16..

10 5/32..

12 3/8..

4 3/8..

5 11/16..

6 ...

5 15/16..

9 1/8..

9 1/16..

10 19/32..

12 15/16..

4 9/16..

5 15/16..

Rough Head=one and one-half diameter of bolt + 1/8

Finished Head = one-half diameter of boll + 1/16.

Bough head-one half distance between parallel sides of head.

Finished head-diameter of bolt-1/16