Hardware Identification & Torque Specifications - Husqvarna PW3300 Illustrated Parts List

Hardware Identi cation & Torque Speci cations
Torque Speci cation Chart
FOR STANDARD METRIC MACHINE HARDWARE (Tolerance ± 20%)
Property
5.6
Class
Class 5.6
in/lbs
Size Of
Hardware ft/lbs Nm.
.56 13.44
M3 5.88
1.28
M4 13.44 30.72
26.4 2.50 60.96
M5
4.3
M6 44.64
5.2 7.1
M7
M8 7.7 10.5
M10 15
21
M12 36
26
M14 42 58
M16
64 88
89 121
M18
M20 126
171
M22 169 230
M24 295
217
M27 435
320
M30 435 590
590
M33 800
M36 759 1030
M39 988 1340
The guides and ruler furnished below are designed to
help you select the appropriate hardware.
20 40
0 10 30
Nut, M8
Thread
Diameter (mm)
Inside
Threads
Diameter (in) per inch
Nut, 1/2-16
0 1
1/2 1/2
1/4 3/4 1/4
Standard Hardware Sizing
When a washer or nut is identi ed as
the Nominal size , meaning the inside diameter is 1/2 inch
(8mm metric thread diameter); if a second number is present
it represents the threads per inch (distance between threads).
When bolt or capscrew is identi ed as
this means the Nominal size , or body diameter is 1/2 inch (8mm
metric thread diameter), the second number,16, represents the
threads per inch, (1.25 thread diameter).
body length of the bolt or screw, 2 inches (50mm).
8.8 10.9
Class 8.8 Class 10.9
in/lbs in/lbs
ft/lbs Nm. ft/lbs Nm.
1.28 19.2 1.80
2.90 43.44 4.10
5.75 8.10
5.97
7.3 9.9 10.3 14
16.5 23
12.1 16.9
17.7 24 25 34
48 67
35 50
61 83 86.2 117
132 185
101 136
147 200 210 285
390
202 275 287
290 390 405 550
390 530 559 745
497 375 708 960
733 995 1032 1400
995 1350 1401 1900
1349 1830 1902 2580
1740 2360 2441 3310
3050
2249 3163 4290
60 80
50 70
Body Length
Screw, M8- 1.25 x 25
Distance between
Thread
threads (mm)
Diameter (mm)
Body Threads
Diameter
per inch
Screw, 1/2- 16 x 2
2 3
1/2
3/4 1/4 3/4
1/2" (M8), this is
1/2 - 16 x 2" (M8 - 1.25 x 50 ),
The nal number is the
FOR STANDARD MACHINE HARDWARE (Tolerance ± 20%)
Hardware
12.9
Grade
Class 12.9
Size Of
in/lbs
Hardware
ft/lbs
Nm.
22.92
2.15 8-32
52.56 4.95 8-36
9.7
7.15 10-24
12.1 16.5 10-32
27
19.9 1/4-20
29
40 1/4-28
59
81 5/16-18
103 140 5/16-24
162 220 3/8-16
250 340 3/8-24
346 470 7/16-14
486 660 7/16-20
656 890 1/2-13
840 1140 1/2-20
1239 1680 9/16-12
1681 2280 9/16-18
2278 3090 5/8-11
2935 3980 5/8-18
5150
3798 3/4-10
3/4-16
7/8-9
7/8-14
1-8
1-12
90 100
1. These torque values are to be used for all hardware
Body
excluding: locknuts, self-tapping screws, thread forming
Diameter
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
Body
b. for ange whizlock nuts and screws - use 135% of
Length (mm)
Body
3. Unless otherwise noted on assembly drawings, all torque
Length (in)
values must meet this speci cation.
Common Hardware Types
4
1/2
1/4 3/4
Hex Head Capscrew
Carriage Bolt
Wrench & Fastener Size Guide
1/4" Bolt or Nut
Wrench—7/16"
M6 Bolt or Nut
Wrench—10mm
Torque Speci cation Chart
No
Marks
SAE Grade 2 SAE Grade 5
in/lbs in/lbs
ft/lbs Nm. ft/lbs
19 30
2.1
20 2.3 31
27 43
3.1
31 3.5 49
66
7.6 8
76 8.6 10
11 15.0 17
12 16.3 19
20 27.2 30
23 31.3 35
30 40.8 50
35 47.6 55
50 68.0 75
55 74.8 90
65 88.4 110
75 102.0 120
90 122.4 150
100 136 180
160 217.6 260
180 244.8 300
140 190.4 400
155 210.8 440
220 299.2 580
240 326.4 640
NOTES
torques.
grade 5 torques.
5/16" Bolt or Nut 3/8" Bolt or Nut
Wrench—1/2" Wrench—9/16"
M8 Bolt or Nut M10 Bolt or Nut
Wrench—13mm Wrench—17mm
SAE Grade 8
in/lbs
Nm. ft/lbs Nm.
41
3.4 4.6
3.5 43 4.9
60
4.9 6.8
5.5 68 7.7
10.9 12 16.3
13.6 14 19.0
23.1 25 34.0
25.8 29 34.0
40.8 45 61.2
47.6 50 68.0
68.0 70 95.2
74.8 80 108.8
102.0 110 149.6
122.4 120 163.2
149.6 150 204.0
163.2 170 231.2
204.0 220 299.2
244.8 240 326.4
353.6 386 525.0
408.0 420 571.2
544.0 600 816.0
598.4 660 897.6
788.8 900 1,244.0
870.4 1,000 1,360.0
Washer
Lockwasher
Hex Nut
7/16" Bolt or Nut 1/2" Bolt or Nut
Wrench (Bolt)—5/8" Wrench—3/4"
Wrench (Nut)—11/16"
M12 Bolt or Nut M14 Bolt or Nut
Wrench—22 mm
Wrench—19mm