Standard Aircraft Handbook for Mechanics and Technicians, Eighth Edition by Ronald Sterkenburg and Peng Hao Wang

Author:Ronald Sterkenburg and Peng Hao Wang
Language: eng
Format: epub
Publisher: McGraw Hill
Published: 2021-06-15T00:00:00+00:00

FIGURE 7-11 Bolt installation.

A nut is not run to the bottom of the threads on the bolt. A nut so installed cannot be pulled tight on the structure and probably will be twisted off while being tightened. A washer will keep the nut in the proper position on the bolt.

In the case of self-locking stop nuts, if from one to three threads of the bolt extend through the nut, it is considered to be satisfactory (Fig. 7-12).

FIGURE 7-12 Minimum bolt protrusion through the nut. Note: Do not use self-locking nuts on bolts drilled for cotter pins.

Palnuts (AN-356) should be tightened securely, but not excessively. Finger-tight plus one to two turns is good practice, two turns being more generally used.

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