Standard Torque Values (Inch); Standard Torque Values (Metric Fasteners) - Toro Power Clear 621 Service Manual

Standard Torque Values (Inch)

Grade 1, 5, & 8
Thread Size with Thin Height
Nuts
In-lb
1/4-20 UNC
48 ± 7
1/4-28 UNF
53 ± 7
5/16-18 UNC
115 ± 15
5/16-24 UNF
138 ± 17
ft-lb
3/8-16 UNC
16 ± 2
3/8-24 UNF
17 ± 2
7/16-14 UNC
27 ± 3
7/16-20 UNF
29 ± 3
1/2-13 UNC
30 ± 3
1/2-20 UNF
32 ± 3
5/8-11 UNC
65 ± 10
5/8-18 UNF
75 ± 10
3/4-10 UNC
93 ± 12
3/4-16 UNF
115 ± 15
7/8-9 UNC
140 ± 20
7/8-14 UNF
155 ± 25

Standard Torque Values (Metric Fasteners)

Thread Size
M5 X 0.8
M6 X 1.0
M8 X 1.25
M10 X 1.5
M12 X 1.75
M16 X 2.0
M20 X 2.5
INCH/METRIC NOTE: Reduce torque values
listed in the table above by 25% for lubricated
fasteners. Lubricated fasteners are defined
as threads coated with a lubricant such as oil,
graphite, or thread sealant such as Loctite
INCH/METRIC NOTE: Torque values may
have to be reduced when installing fasteners
into threaded aluminum or brass. The
specific torque value should be determined
based on the fastener size, the aluminum
Toro Single Stage Snow Service Manual
SPECIFICATIONS & MAINTENANCE
SAE Grade 1 Bolts
In-lb
N-cm
53 ± 7 599 ± 79
65 ± 10 734 ± 113
105 ± 15 1186 ± 169
128 ± 17 1446 ± 192
ft-lb
N-m
16 ± 2 22 ± 3
18 ± 2 24 ± 3
27 ± 3 37 ± 4
29 ± 3 39 ± 4
48 ± 7 65 ± 9
53 ± 7 72 ± 9
88 ± 12 119 ± 16
95 ± 15 129 ± 20
140 ± 20 190 ± 27
165 ± 25 224 ± 34
225 ± 25 305 ± 34
260 ± 30 353 ± 41
Class 8.8 Bolts
57 ± 5 in­lb 644 ± 68 N­cm
96 ± 10 in­lb 1085 ± 113 N­cm
19 ± 2 ft­lb 26 ± 3 N­m
38 ± 4 ft­lb 52 ± 5 N­m
66 ± 7 ft­lb 90 ± 10 N­m
166 ± 15 ft­lb 225 ± 23 N­m
325 ± 33 ft­lb 440 ± 45 N­m
or base material strength, length of thread
engagement, etc.
INCH/METRIC NOTE: The nominal torque
values listed above for Grade 5 and 8
® .
fasteners are based on 75% of the minimum
proof load specified in SAE J429.
The tolerance is approximately ± 10% of the
nominal torque value. Thin height nuts include
jam nuts.
SAE Grade 5 Bolts
In-lb
N-cm
100 ± 10 1125 ± 100
115 ± 10 1300 ± 100
200 ± 25 2250 ± 280
225 ± 25 2540 ± 280
ft-lb
N-m
30 ± 3 41 ± 4
35 ± 3 47 ± 4
50 ± 5 68 ± 7
55 ± 5 75 ± 7
75 ± 8 102 ± 11
85 ± 8 115 ± 11
150 ± 15 203 ± 20
170 ± 15 230 ± 20
265 ± 25 359 ± 34
300 ± 25 407 ± 34
430 ± 45 583 ± 61
475 ± 45 644 ± 61
Class 10.9 Bolts
78 ± 8 in­lb
133 ± 14 in­lb
28 ± 3 ft­lb
54 ± 6 ft­lb
93 ± 10 ft­lb
229 ± 23 ft­lb
450 ± 36 ft­lb
METRIC NOTE: The nominal torque values
listed above are based on 75% of the
minimum proof load specified in SAE J1199.
The tolerance is approximately ± 10% of the
nominal torque value. Thin height nuts include
jam nuts.
SAE Grade 8 Bolts
In-lb
N-cm
140 ± 15 1580 ± 170
160 ± 15 1800 ± 170
300 ± 30 3390 ± 340
325 ± 30 3670 ± 340
ft-lb
N-m
43 ± 4 58 ± 5
50 ± 4 68 ± 5
70 ± 7 68 ± 9
77 ± 7 104 ± 9
105 ± 10 142 ± 14
120 ± 10 163 ± 14
210 ± 20 285 ± 27
240 ± 20 325 ± 27
374 ± 35 508 ± 47
420 ± 35 569 ± 47
600 ± 60 813 ± 81
660 ± 60 895 ± 81
881 ± 90 N­cm
1503 ± 158 N­cm
38 ± 4 N­m
73 ± 8 N­m
126 ± 14 N­m
310 ± 31 N­m
610 ± 62 N­m
2-3