A rusted fastener can sometimes be tightened slightly to help penetrating oil get into the threads.

Name: A rusted fastener can sometimes be tightened slightly to help penetrating oil get into the threads.
Brand: Quizplus
Rating: 4.8 (39 reviews)

Question

Quizplus · Accepted Answer

This is because tightening the fastener can sometimes break up some rust particles and make it easier for the penetrating oil to reach the deeper threads. However, this should be done with caution as forcing the rusted fastener too much can cause further damage.

A Rusted Fastener Can Sometimes Be Tightened Slightly to Help