FAA Sheet Metal Structures Practice Test 2025 - Free Practice Questions and Study Guide

The designation MS20430AD-4-8 provides specific information about the dimensions of the rivet. In this code, the "4" indicates the diameter of the rivet, and in the MS20430 series, this corresponds to a diameter of 1/8 inch. The "8" indicates the length of the rivet in eighths of an inch. Since "8" refers to 8/8 of an inch, this equals 1 inch.

However, to find the length, it is essential to note the context in the question. The term "AD" indicates that this reference point follows a specific series that typically features a length component understood in terms of fractions or further delineated representations within the industry. Correctly interpreted, an MS20430AD-4-8 rivet specifically has a 1/8 inch diameter but designed for a nominal value, which might be misinterpreted at times.

Considering the myriad of 8s may mislead to varied lengths, it's crucial to clarify that the "8" translates to the length specification involving further interpretations. In some interpretations and practices, length may adjust as practical applications vary.

With this context, the dimensions clearly stand for 1/8 inch in diameter and