Simplicity Hardware Identification & Torque Specifications

Torque Specification Chart
FOR STANDARD MACHINE HARDWARE (Tolerance ± 20%)
Hardware
Grade
SAE Grade 2 SAE Grade 5 SAE Grade 8
Size Of in/lbs in/lbs in/lbs
Hardware ft/lbs Nm. ft/lbs Nm. 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 7.6 810.9 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
Hex Head Capscrew
Hex Nut
Lockwasher
Washer
Carriage Bolt
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 torque.
b. For flange whizlock nuts and screws:
use 135% of Grade 5 torque.
3. Unless otherwise noted on assembly drawings,
all torque values must meet this specification.
Hardware Identification & Torque Specifications
Common Hardware Types
Screw, 1/2 x 2
Body
Diameter
Body
Length
Inside
Diameter
Nut, 1/2”
No
Marks
3/8” Bolt or Nut
Wrench—9/16”
3/8
5/16” Bolt or Nut
Wrench—1/2”
5/16
1/4” Bolt or Nut
Wrench—7/16”
1/4
1/2” Bolt or Nut
Wrench—3/4”
1/2
7/16
7/16” Bolt or Nut
Wrench (Bolt)—5/8”
Wrench (Nut)—11/16”
Wrench & Fastener Size Guide
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 represents the
threads per inch.
When a 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 (2 inches long in this example).
The guides and ruler furnished below are designed to
help you select the appropriate hardware and tools.
0
1/4 3/4
1/2
1
1/4 3/4
1/2
2
1/4 3/4
1/2
3
1/4 3/4
1/2
4