The nosepiece is often the most overlooked part of a riveter, yet it makes the difference between a perfect fastening and a stuck mandrel. The internal diameter must match the rivet mandrel to ensure proper pulling and proper retention.
Using a nosepiece that is too large increases the risk of slipping and irregular mandrel breakage; using one that is too small leads to frequent jamming and premature tool wear. Reference tables matching rivet types with the recommended nosepieces are
In specific applications – such as structural rivets, soft materials, or reduced head types – it is good practice to test the fastening performance with different nosepieces before standardising the choice.