What information is essential for determining the size of a fastener?

• A. Weight of the object and load type
• B. Type of fastener material
• C. Weight of the object, fixture hole size, load tension type
• D. Depth of the hole in the fastener

Answer: (C)

Determining the size of a fastener requires understanding several critical factors, which is why the selected answer encompasses multiple aspects. The weight of the object is essential as it directly influences the load the fastener needs to support. If the weight is incorrectly assessed, the fastener may either be undersized, leading to failure, or oversized, which could be inefficient.

Fixture hole size is another important element; it dictates the maximum diameter of the fastener that can fit into the assembly. If the fastener is too large for the hole, it cannot be installed properly, and if it is too small, it may not provide the necessary strength.

Load tension type refers to how the load is applied (e.g., static or dynamic) and also informs the selection of a fastener. Different load types can affect the choice of fasteners regarding their material and design to withstand various stresses and prevent failure.

The combination of these three factors provides a comprehensive basis for determining the precise size of a fastener needed for a specific application, ensuring it functions effectively under expected conditions.