Ask Away! with Jeff Smith: The Truth Behind Torque-to-Yield Fasteners and Torque Angle Fastening
What’s the difference between a torque-to-yield bolt and a torque-angle bolt? I see these bolts used with newer engines. Are they the same thing? I’ve also heard that you’re not supposed to reuse these bolts. Is that true? Thanks D.T. Jeff Smith: First and most importantly, let’s distinguish between what we’re talking about. Your first
Fastener Tech: The “Friction Factor” and Why It Matters
When it comes to properly tightening automotive fasteners, there are several methods you can use. The most accurate way is to use a stretch gauge to measure the overall stretch of a fastener. This ensures the bolt has been stretched to achieve the proper amount of clamping force without being over-tightened. The problem is most




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