Figure 2-73. Turnbuckle Thread Limits
Cotter pin shall be new upon each application. Old cotter pins may fail causing damage to component
Use brass cotter pins In areas where nonmagnetic material Is required Use corrosion-resistant cotter
pins In areas where corrosion-resistant material is required
Avoid kinks or sharp bends In cotter pins.
(1) Install cotter pin in castellated nuts and bolts with head parallel to slot in nut, as shown In figure 2-77.
This Is the preferred method
Figure 2-74. Lockring
Figure 2-75. Lockring Principle
(2) Install cotter pin with head horizontal to slot In nut as an alternate installation, as shown In figure 2-77.
This method will be followed where there is danger of snagging hands, clothing, or equipment of flight
personnel on sharp ends of cotter pin or because of installation difficulties.
In event more than 50 percent of cotter pin diameter Is above castellation, a washer shall be used under
nut, or a shorter fastener shall be used.