Torque Specification - Craftsman 107.280340 Operator's Manual

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Common Hardware Types
Hex Head Capscrew
Carriage Belt
_ 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 × 2", this
means the Nominal size, or body diameteris 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 tong).
The guides and ruler furnished below are designed to
help you select the appropriate hardware and tools°
--Z-
--Z-
A
Screw, 1/2 × 2
Body J
Diameter
Torque Specification Chart
FOR STANDARD MACHINE HARDWARE (Tolerance ± 20%)
© 0 ©
SAE Grade2 SAEGrade 5 SAEGrade8
Size Of inZIbs inZIbs !
Hardware ft/ibs Nm, ft/ibs Nm, ft/ibs Nm,
19 2.1 30 3.4 41 4.6
20 2.3 31 3.5 43 4.9
27 3.1 43 4.9 60 6.8
31 3.5 49 5.5 68 7.7
66 7.6 8 10.9 12 16.3
76 8.6 18 13.6 14 19.0
11 15.0 17 23.1 25 34.0
12 16.3 19 25.8 27 34.0
28 27.2 ...... 38 40.8 45 61.2
23 31,3 47,6 58 68,0
38 68.0 78 95.2
35 4.6 74.8 88 108.8
58 75 102.0 118 149.6
5 f_8 98 122,4 128 163,2
8gA 118 149.6 158 204.0
102.0 128 163.2 178 231.2
122.4 158 204.0 228 299.2
136 188 244.8 248 326.4
188 217,6 288 353,6 388 525,0
188 244.8 388 408.0 428 571.2
148 190.4 488 544.0 888 816.0
155 210,8 448 598,4 888 897,6
228 299.2 588 788.8 988 1,244.0
248 326.4 848 870.4 1,888 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--l/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 - 49