Wrench & fastener size guide, Hardware identification & torque specifications, Pts - 42 – Craftsman 107.289920 User Manual
Page 118
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Hardware Identification & Torque Specifications
Common Hardware Types
Hex Head Capscrew
m
D C
Carriage Bolt
) m.
Washer
Lockwasher
Hex Nut
Standard Hardware Sizing
When a washer or nut is identified as
1/2”,
this is the
Nominal size,
meaning the
inside diameter
is 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 per Inch
(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.
Inside
Diameter
K5
K5
Torque Specification Chart
FOR STANDARD MACHINE HARDWARE (Tolerance ± 20%)
Hardware
Grade
P
A/o^
[ M a r k s \
SAE Grade 2
0
SAE Grade 5
SAE Grade 8
Size Of
Hardware
in/lbs
ft/lbs
Nm.
in/lbs
ft/lbs
Nm.
in/lbs
ft/lbs
Nm.
8-32
19
2.1
30
3.4
41
4.6
8-36
20
2.3
31
3.5
43
4.9
10-24
27
3.1
43
4.9
60
6.8
10-32
31
3.5
49
5.5
68
7.7
1/4-20
66
7.6
8
10.9
12
16.3
1/4-28
76
8.6
10
13.6
14
19.0
5/16-18
11
15.0
17
23.1
25
34.0
5/16-24
12
16.3
19
25.8
27
34.0
3/8-16
20
27.2
30
40.8
45
61.2
3/8-24
23
31.3
35
47.6
50
68.0
7/16-14
30
40.8
50
68.0
70
95.2
7/16-20
35
47.6
55
74.8
80
108.8
1/2-13
50
68.0
75
102.0
110
149.6
1/2-20
55
74.8
90
122.4
120
163.2
9/16-12
65
88.4
110
149.6
150
204.0
9/16-18
75
102.0
120
163.2
170
231.2
5/8-11
90
122.4
150
204.0
220
299.2
5/8-18
100
136
180
244.8
240
326.4
3/4-10
160
217.6
260
353.6
386
525.0
3/4-16
180
244.8
300
408.0
420
571.2
7/8-9
140
190.4
400
544.0
600
816.0
7/8-14
155
210.8
440
598.4
660
897.6
1-8
220
299.2
580
788.8
900
1,244.0
1-12
240
326.4
640
870.4
1,000
1,360.0
NOTES
1. These torque values are to be used for all hardware
excluding: locknuts, self-tapping screws, thread forming
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
torques.
b. for flange whiziock nuts and screws - use 135% of
grade 5 torques.
3. Unless otherwise noted on assembly drawings, all torque
values must meet this specification.
W rench & Fastener Size Guide
1/4” Bolt or Nut
Wrench—7/16”
5/16” Bolt or Nut
Wrench—1/2”
3/8” Bolt or Nut
Wrench—9/16”
7/16” Bolt or Nut
Wrench (Bolt)—5/8”
Wrench (Nut)—11/16”
1/2” Bolt or Nut
Wrench—3/4”
PTS - 42