Hardwareidentification& TorqueSpecifications
Common Hardware Types
Hex Head Capscrew
Carriage Belt
€(((((((((((((((((((0
Washer
Leckwasher
_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_
- _o
m_
m_
m_
mC._
Nut, 1/2"
Inside
Diameter
Screw, 1/2 x 2 _i- I
od,J I
Oi eter( /
i il
Torque Specification Chart
FOR STANDARD MACHINE HARDWARE (Tolerance + 20%)
_raarddeware G 0 Q
SAEGrade2 SAEGrade5 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 - 39
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