Hardware identification& TorqueSpecifications
Common
Hardware
Types
Hex Head Capscrew
Carriage
Bolt
[(((((((((((((((((((
0
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
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.
m
-
co
m_
co
m_
m_
co
m_
m_
co
m4_
Nut, 1/2"
Inside
Diameter
Screw, 1/2 x 2 _-
I
Ood,
J
I
O a ete
(
"/
_ength
_
Torque Specification
Chart
FOR STANDARD MACHINE HARDWARE (Tolerance + 20%)
_ raardd
eware
G
O
O
SAE Grade2
SAEGrade 5
SAEGrade8
Size Of
in/Ibs
in/Ibs
Hardware
ft/I bs
ft/I bs
Nm.
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
19
20
27
31
66
76
11
12
20
23
30
35
50
55
65
75
90
100
160
180
140
155
220
240
in/Ibs
Nm.
ft/Ibs
Nm.
2.1
30
3.4
2.3
31
3.5
3.1
43
4.9
3.5
49
5.5
7.6
8
10.9
8.6
10
13.6
15.0
17
23.1
16.3
19
25.8
27.2
30
40.8
31.3
35
47.6
40.8
50
68.0
47.6
55
74.8
68.0
75
102.0
74.8
90
122.4
88.4
110
149.6
102.0
120
163.2
122.4
150
204.0
136
180
244.8
217.6
260
353.6
244.8
300
408.0
190.4
400
544.0
210.8
440
598.4
299.2
580
788.8
326.4
640
870.4
41
4.6
43
4.9
60
6.8
68
7.7
12
16.3
14
19.0
25
34.0
27
34.0
45
61.2
50
68.0
70
95.2
80
108.8
110
149.6
120
163.2
150
204.0
170
231.2
220
299.2
240
326.4
386
525.0
420
571.2
600
816.0
660
897.6
900
1,244.0
1,000
1,360.0
NOTES
1. These torque values are to be used for all hardware
excluding: Iocknuts, self-tapping
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.
Wrench
& Fastener Size Guide
1/4" Bolt or Nut
Wrench--7/16"
5/16" Bolt or Nut
Wrench--I/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 - 36