While having a discussion, Technician A says that normal head bolt torque values have a calculated safety factor of about 25% less than the maximum amount a bolt can be torqued without becoming permanently stretched. Technician B says that the safety factor is about 5%. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because normal head bolt torque values indeed have a calculated safety factor to prevent the bolt from becoming permanently stretched, and this safety factor is typically around 25% less than the maximum torque the bolt can handle, not as low as 5% as suggested by Technician B.

While Having a Discussion, Technician a Says That Normal Head