bolt Archives - UnderhoodService
Simple Engine Fasteners Actually Complex Engineering Systems

Fasteners act much the same as a spring due to the physics of stretch and rebound.

GM Tech Tip: Torque-To-Yield TTY Fastener Use And Reuse

A fastener with a torque + angle specification must be tightened first to the torque part of the specification and then tightened further by the addition of the specified angle. The angle must be applied relative to the mating fastener.