Machinery's Handbook Pocket Companion

Fastener Information

TORQUE AND TENSION IN FASTENERS

Table 1: Grade Identification Marks and Mechanical Properties of Bolts and Screws

Identifier

Grade

Size (in.)

Min. Strength (10 3 psi)

Material & Treatment

Proof

Tensile

Yield

A

SAE Grade 1

to 1

33

60

36

1

ASTM A307

to 1

33

60

36

3

SAE Grade 2

to

55

74

57

1

? to 1

33

60

36

SAE Grade 4

to 1

65

115

100

2,a

B

SAE Grade 5

to 1

85

120

92

2,b

ASTM A449

1 ? to 1

74

105

81

ASTM A449

1 to 3

55

90

58

C

SAE Grade 5.2

to 1

85

120

92

4,b

D

ASTM A325, Type 1

to 1

85

120

92

2,b

1 ? to 1

74

105

81

E

ASTM A325, Type 2

to 1

85

120

92

4,b

1 ? to 1

74

105

81

F

ASTM A325, Type 3

to 1

85

120

92

5,b

1 ? to 1

74

105

81

G

ASTM A354, Grade BC

to 2

105

125

109

5,b

2 to 4

95

115

99

H

SAE Grade 7

to 1

105

133

115

7,b

I

SAE Grade 8

to 1

120

150

130

7,b

ASTM A354, Grade BD

to 1

120

150

130

6,b

J

SAE Grade 8.2

to 1

120

150

130

4,b

K

ASTM A490, Type 1

to...

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