Maintenance Level 1 (ML1) AMTP Evaluation Practice Test 2026 - Free Maintenance Level 1 Practice Questions and Study Guide

Brass cotter pins are chosen for situations where nonmagnetic behavior is required. Brass is nonmagnetic, so using it avoids any magnetic attraction or interference with nearby magnets or sensitive electrical components. That makes it the best fit for areas where maintaining nonmagnetic material is important, such as around electrical equipment or instruments that can be affected by magnetism.

In contrast, brass isn’t used for all structural fasteners because it’s softer and weaker than many steels, so it wouldn’t handle high-load or high-stress situations well. It also isn’t ideal for high-temperature zones since brass loses strength and can creep or deform. Cosmetic use doesn’t justify the material choice given these properties.