Metric bolt and cap screw torque values – John Deere 318 User Manual

Page 30

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METRIC BOLT AND CAP SCREW TORQUE VALUES

Class 4.8

Class 8.8 or 9.8

Class 10.9

Class 12.9

Size

Lubricated

a

Dry

a

Lubricated

a

Dry

a

Lubricated

a

Dry

a

Lubricated

a

Dry

a

N·m

lb-ft

N·m

lb-ft

N·m

lb-ft

N·m

lb-ft

N·m

lb-ft

N·m

lb-ft

N·m

lb-ft

N·m

lb-ft

M6

4.8

3.5

6

4.5

9

6.5

11

8.5

13

9.5

17

12

15

11.5

19

14.5

M8

12

8.5

15

11

22

16

28

20

32

24

40

30

37

28

47

35

M10

23

17

29

21

43

32

55

40

63

47

80

60

75

55

95

70

M12

40

29

50

37

75

55

95

70

110

80

140

105

130

95

165

120

M14

63

47

80

60

120

88

150

110

175

130

225

165

205

150

260

190

M16

100

73

125

92

190

140

240

175

275

200

350

255

320

240

400

300

M18

135

100

175

125

260

195

330

250

375

275

475

350

440

325

560

410

M20

190

140

240

180

375

275

475

350

530

400

675

500

625

460

800

580

M22

260

190

330

250

510

375

650

475

725

540

925

675

850

625

1075

800

M24

330

250

425

310

650

475

825

600

925

675

1150

850

1075

800

1350

1000

M27

490

360

625

450

950

700

1200

875

1350

1000

1700

1250

1600

1150

2000

1500

M30

675

490

850

625

1300

950

1650

1200

1850

1350

2300

1700

2150

1600

2700

2000

M33

900

675

1150

850

1750

1300

2200

1650

2500

1850

3150

2350

2900

2150

3700

2750

M36

1150

850

1450

1075

2250

1650

2850

2100

3200

2350

4050

3000

3750

2750

4750

3500

DO NOT use these values if a different torque value
or tightening procedure is given for a specific
application. Torque values listed are for general use
only. Check tightness of fasteners periodically.

Shear bolts are designed to fail under predetermined
loads. Always replace shear bolts with identical
property class.

Fasteners should be replaced with the same or
higher property class. If higher property class
fasteners are used, these should only be tightened to
the strength of the original.

Make sure fasteners threads are clean and that you
properly start thread engagement. This will prevent
them from failing when tightening.

Tighten plastic insert or crimped steel-type lock nuts
to approximately 50 percent of the dry torque shown
in the chart, applied to the nut, not to the bolt head.
Tighten toothed or serrated-type lock nuts to the full
torque value.

a

“Lubricated” means coated with a lubricant such as engine oil, or

fasteners with phosphate and oil coatings. “Dry” means plain or zinc
plated without any lubrication.

TS1163

-19

-04MAR91

DX,TORQ2 -19-20JUL94

Repair Specifications/Metric Series Torque Chart

TM1590 (17MAY95)

10-15-4

316, 318 & 420 Lawn and Garden Tractors

020895

10

15

4

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