Torque Values For Standard U.s. Fasteners - Doosan DX140R Shop Manual

TORQUE VALUES FOR
STANDARD U.S. FASTENERS
S.A.E.
Type
Grade
1 1 OR 2
5 5
8 8
Recommended torque, in foot pounds, for all Standard
Application Nuts and Bolts, provided:
1. All thread surfaces are clean and lubricated with SAE-30
engine oil. (See Note.)
2. Joints are rigid, that is, no gaskets or compressible
materials are used.
3. When reusing nuts or bolts, use minimum torque values.
NOTE: Multiply the standard torque by:
0.65 When finished jam nuts are used.
0.70 When Molykote, white lead or similar
mixtures are used as lubricants.
0.75 When Parkerized bolts or nuts are used.
0.85 When cadmium plated bolts or nuts and
zinc bolts w/waxed zinc nuts are used.
0.90 When hardened surfaces are used under
the nut or bolt head.
NOTE: When reusing bolts and nuts in service, use
minimum torque values.
Standard Torques
WILL HAVE NO MARKINGS IN THE CENTER OF THE
HEAD.
Low or Medium Carbon Steel Not Heat Treated.
WILL HAVE THREE RADIAL LINES.
Quenched and Tempered Medium Carbon Steel.
WILL HAVE 6 RADIAL LINES.
Quenched and Tempered Special Carbon or Alloy Steel.
Description
Bolt Head
Marking
SP000813
Page 7