Hardware Identification & Torque Specifications

Common Hardware Types

Hex Head Capscrew

Washer

 

 

Lockwasher

Carriage Bolt

 

 

Hex Nut

Standard Hardware Sizing

When a washer or nut is identified as 1/2”, this is the nominal size, meaning the inside diameter is 1/2 inch; if a second number is present it represents the threads per inch.

When a bolt or capscrew is identified as 1/2 - 16 x 2”, this means the nominal size , or body diameter is 1/2 inch; the second number represents the threads per inch (16 in this example), and the final number is the body length of the bolt or screw (2 inches long in this example).

The guides and ruler furnished below are designed to help you select the appropriate hardware and tools.

0

Nut, 1/2”

1/4

Inside

1/2

Diameter

 

 

3/4

 

1

 

1/4

Screw, 1/2 x 2

1/2

3/4

Body

2

Diameter

1/4

 

Body

1/2

Length

3/4

 

 

3

 

1/4

 

1/2

 

3/4

 

4

Torque Specification Chart

FOR STANDARD MACHINE HARDWARE (Tolerance ± 20%)

Hardware

 

No

 

 

 

 

Marks

 

 

 

 

Grade

SAE Grade 2

SAE Grade 5

SAE Grade 8

 

 

 

 

 

 

 

 

 

Size Of

in/lbs

 

 

in/lbs

 

in/lbs

 

Hardware

ft/lbs

 

Nm.

ft/lbs

Nm.

ft/lbs

Nm.

 

 

 

 

 

 

 

 

8-32

19

 

2.1

30

3.4

41

4.6

8-36

20

 

2.3

31

3.5

43

4.9

10-24

27

 

3.1

43

4.9

60

6.8

10-32

31

 

3.5

49

5.5

68

7.7

1/4-20

66

 

7.6

8

10.9

12

16.3

1/4-28

76

 

8.6

10

13.6

14

19.0

5/16-18

11

 

15.0

17

23.1

25

34.0

5/16-24

12

 

16.3

19

25.8

27

34.0

3/8-16

20

 

27.2

30

40.8

45

61.2

3/8-24

23

 

31.3

35

47.6

50

68.0

7/16-14

30

 

40.8

50

68.0

70

95.2

7/16-20

35

 

47.6

55

74.8

80

108.8

1/2-13

50

 

68.0

75

102.0

110

149.6

1/2-20

55

 

74.8

90

122.4

120

163.2

9/16-12

65

 

88.4

110

149.6

150

204.0

9/16-18

75

 

102.0

120

163.2

170

231.2

5/8-11

90

 

122.4

150

204.0

220

299.2

5/8-18

100

 

136

180

244.8

240

326.4

3/4-10

160

 

217.6

260

353.6

386

525.0

3/4-16

180

 

244.8

300

408.0

420

571.2

7/8-9

140

 

190.4

400

544.0

600

816.0

7/8-14

155

 

210.8

440

598.4

660

897.6

1-8

220

 

299.2

580

788.8

900

1,244.0

1-12

240

 

326.4

640

870.4

1,000

1,360.0

 

 

 

 

 

 

 

 

NOTES

1.These torque values are to be used for all hardware excluding: locknuts, self-tapping screws, thread forming screws, sheet metal screws and socket head setscrews.

2.Recommended seating torque values for locknuts:

a.For prevailing torque locknuts: use 65% of Grade 5 torque.

b.For flange whizlock nuts and screws: use 135% of Grade 5 torque.

3.Unless otherwise noted on assembly drawings, all torque values must meet this specification.

Wrench & Fastener Size Guide

 

5/16

3/8

7/16

1/2

1/4

 

 

 

1/4” Bolt or Nut

5/16” Bolt or Nut

3/8” Bolt or Nut

7/16” Bolt or Nut

1/2” Bolt or Nut

Wrench—7/16”

Wrench—1/2”

Wrench—9/16”

Wrench (Bolt)—5/8”

Wrench—3/4”

 

 

 

Wrench (Nut)—11/16”

 

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Simplicity ZT2761F, ZT2561F specifications Hardware Identification & Torque Specifications