A non-shouldered eyebolt is primarily designed for lifting in which plane?

A non-shouldered eyebolt is primarily designed for vertical lifting. This is because its design does not include features that provide support or stability for applications other than direct vertical pull. When lifting loads vertically using a non-shouldered eyebolt, the forces are directly aligned with the bolt's axis, allowing it to effectively carry the weight without the risk of bending or shearing that can occur when used at angles.

Using a non-shouldered eyebolt outside of its intended vertical lifting design can lead to increased risk since the load may not be evenly distributed, potentially leading to failure of the bolt or the lifting system. Therefore, it is crucial for riggers to adhere to the manufacturer's specifications and intended use cases for such equipment to ensure safety and effectiveness during lifting operations.