What is the correct drill size for a rivet with a 1/8" shank?

To determine the correct drill size for a rivet with a 1/8" shank, it's essential to convert the shank diameter into metric units, as some drill sizes are listed in millimeters. A 1/8" shank is equivalent to approximately 3.175 mm when converted from inches to millimeters.

In the context of drilled holes for rivets, it is common practice to select a drill size that is slightly larger than the rivet shank to ensure proper insertion and accommodate any coating or plating. The drill size of 3.3 mm provides a suitable clearance for a 1/8" shank, allowing the rivet to fit comfortably without excessive play, which could lead to a weak joint.

Choosing the 3.3 mm drill size is advantageous because it balances the need for enough space to insert the rivet while maintaining a tight enough fit to ensure structural integrity. Other sizes like 3.2 mm or those beyond might be too tight or provide unnecessary clearance, affecting the rivet's hold in the joint.

Therefore, the appropriate choice of 3.3 mm drill size aligns best with industry standards for drilling holes for rivets with a 1/8" shank, ensuring