What is the appropriate stub size for a 2" bolt hole?

The appropriate stub size for a 2" bolt hole is 1-1/2 inches. In pipefitting and related construction trades, the stub size is typically determined by the nominal size of the hole required for a corresponding bolt. For a 2" bolt hole, a stub of 1-1/2 inches provides the necessary support and structural integrity for the bolt to function effectively.

This dimension is also aligned with standard practices in the industry, where certain bolt sizes have established stub sizes that meet specific strength and stability requirements. Understanding these relationships ensures that installations are done correctly, preventing potential issues with loose fittings or misalignments during assembly.

In the context of the options provided, while the other sizes may seem reasonable, they do not correspond to the standard stub size required for a 2" bolt hole, emphasizing the importance of familiarity with industry standards for proper installation and durability.