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Hardware identification& TorqueSpecifications
Common
Hardware Types
Hex Head Capscrew
C
(((((((((((((((((((()
{(/(((((/(((((((((( Q
Carriage Belt
C
1((1(11(1((1((1(11((,
(((1((((1((((1((1(((
O
Washer
Lockwasher
O
HexNut
Standard
Hardware
Sizing
When
a washer
or nut is identified
as 112", 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 112 - 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_
-"
Screw,
--_
Body
Diameter
m_
m4_
Nut, 1/2"
Inside
Diameter
1/2x2
"
Length
Wrench & Fastener Size Guide
114" Bolt or Nut
5/16" Bolt or Nut
Wrench--7/16"
Wrench--1/2"
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/Ibs
ft/Ibs
Nm.
19
2.1
20
2.3
27
3.1
31
3.5
in/Ibs
ft/Ibs
Nm.
30
3.4
31
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
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
10.9
12
16.3
13.6
14
19.0
23.1
25
34.0
25.8
27
34.0
40.8
45
61.2
47.6
58
68.0
68.0
78
95.2
74.8
80
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
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
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.
318" 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 - 6
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