Craftsman 28790 - 26 HP 50 in. Zero Turn Tractor Mower Operator's Manual page 103

Hardwareidentification 8=Torque Specifications
Common Hardware Types
Hex Head Capscrew
C _ll(/(_li((,_(tl((l( ) _
Carriage Belt
Washer
Lockwasher
O Hex Nut
Standard Hardware Sizing
When a washer or nut is identified as 1/2", this is the
Nominal size, meaning the inside diameteris 1/2 inch; if a
second number is present it represent the threads per inch
When 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 perinch (16 in this
example, and the final number is the body length of the
bolt or screw (in this example 2 inches long).
The guides and ruler furnished below are designed to
help you select the appropriate hardware and tools.
m_
--4
m4_
Screw_
Body
Diameter
Nut, 1/2"
Inside
Diameter
1/2×27 _ _
Wrench & Fastener Size Guide
1/4" Bolt or Nut 5/16" Bolt or Nut
Wrench--7/16" Wrench--I/2"
Hardware
Grade
Torque Specification Chart
FOR STANDARD MACHINE HARDWARE (Tolerance _+20%)
© © ©
SAEGrade 2 SAEGrade5 SAEGrade8
Size Of
Hardware
8-32
8-36
10-24
10-32
1/4-20
1/4-28
5/16-18
5/16-24
3/8-16
3/8-24
7/16-14
7/16-20
1/2-13
1/2-20
9/16-12
9/16-18
5/8-11
5/8-18
3/4-10
3/4-16
7/8-9
7/8-14
1-8
1-12
in/lbs
ft/Iba Nm.
19 2.1
20 2.3
27 3.1
3! 3.5
in/lbs
ft/Ibs Nm.
30 3.4
3! 3.5
43 4.9
49 5.5
in/Ibs
ft/Ibs Nm.
41 4.6
43 4.9
60 6.8
68 7.7
66 7.6 8
76 8.6 18
11 15.0 17
12 16.3 19
28 27.2 38
23 31.3 35
38 40.8 58
35 47.6 55
58 68.0 75
55 74.8 98
65 88.4 118
75 102.0 128
98 122.4 158
188 136 188
188 217.6 268
188 244.8 388
148 190.4 488
155 210.8 448
220 299.2 588
248 326.4 648
10.9 12 16.3
13.6 14 19.0
23.1 25 34.0
25.8 27 34.0
40.8 45 612
47.6 58 68.0
68.0 78 95.2
74.8 88 108.8
102.0 118 149.6
122.4 128 163.2
149.6 158 204.0
163.2 178 231.2
204.0 220 299.2
244.8 248 326.4
353.6 386 525.0
408.0 428 571.2
544.0 888 816.0
598.4 868 897.6
788.8 980 1,244.0
870.4 1,000 1,360.0
NOTES
1. These torque values are to be used for all hardware
excluding: Iocknuts, self4apping screws, thread forming
screws, sheet metal screws and socket head setscrews.
2. Recommended seating torque values for Iocknuts:
a. for prevailing torque Iocknuts - use 65% of grade 5
torques.
b. for flange whizlock nuts and screws - use 135% of
grade 5 torques.
3. Unless otherwise noted on assembly drawings, all torque
values must meet this specification.
318" Bolt or Nut
Wrench--9/16"
7116" Bolt or Nut
Wrench (Bolt)--5/8"
Wrench (Nut)--11/16"
1/2" Bolt or Nut
Wrench--3/4"
PTS - 39