Tag Archives: galling

Fastener Thread Galling: What Is It & How to Prevent It?

Posted on March 28, 2017 by dean

Thread galling is a common yet a seldom understood fastener problem seen by engineers and fabricators. It occurs when pressure and friction cause bolt threads to seize to the threads of a nut or tapped hole. The fasteners are not just overly tight but “cold/contact” welded together.

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MP35N bolts for high strength application

Posted on February 8, 2017 by dean

Q: We need advice on a material that will deliver a tensile strength of 210 to 250 ksi, as well as help us protect against galling. The attaching areas are stainless steel Grade 8. A:   For this instance, we would suggest MP35N. This alloy was developed specifically for high … Continue reading →

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