TECHNICAL DATA
Torque Specifications
Engine crankshaft bolt
Deck pulley bolts
Lug nuts
Blade bolt
U.S. Standard Hardware
Grade
Size
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1-1/8
** Grade 5 - Minimum commercial quality (lower quality not recommended)
Metric Standard Hardware
Grade
Size
M4
M5
M6
M7
M8
M10
M12
M14
M16
M18
M20
M22
M24
M27
HEX HEAD CAP SCREWS
The torque values shown must be used as a general guideline
when specific torque values are not given.
SAE Grade 5
ft./lbs
Nm
9
18
31
50
75
102
110
149
150
203
250
339
378
512
782
1060
Grade 8.8
ft./lbs
1.5
3
5.2
8.2
13.5
24
43.5
70.5
108
142
195
276
353
530
Standard 1/4" fasteners
50 ft/lb
Standard 5/16" fasteners
150 ft/lb
Standard 3/8" fasteners
75 ft/lb
Standard 7/16" fasteners
90 ft/lb
Standard 1/2" fasteners
SAE Grade 8
ft./lbs
12
13
24
28
42
46
68
75
115
165
225
370
591
1410
Grade 10.9
Nm
ft./lbs
2
2.2
4
4.5
7
7.5
11
12
18
18.8
33
35.2
59
62.2
96
100
146
147
193
202
264
275
374
390
478
498
719
735
9 ft/lb
18 ft/lb
33 ft/lb
52 ft/lb
80 ft/lb
Flangelock Screw
w/Flangelock Nut
Nm
ft./lbs
18
38
24
62
40
102
156
224
305
502
801
1912
Grade 12.9
Nm
ft./lbs
3
2.7
6
5.2
10
8.2
16
15
25
21.8
48
43.5
84
75
136
119
199
176
274
242
373
330
529
471
675
596
996
904
Nm
33
54
Nm
3.7
7
11
20
30
59
102
161
239
328
447
639
808
1226
33