Monthly archives: December, 2020

What’s the Difference Between a Bolt and a Capscrew? – 12-6-20

       (and how does this affect the nut factor?) The terms “bolt“ and “capscrew” are commonly used interchangeably.  But the variations between the two are fairly significant from a manufacturing perspective and assembly standpoints.  What’s the difference?  Why does it matter? A bolt is designed for insertion through holes in assembled parts to mate with a …

Thread Engagement – How Much Is Enough? 12/2/20

Since bolts and nuts stretch slightly under load, the distribution of stress on the threads is not uniform. Theoretically, the first thread takes a third of the load, the first three threads take three-quarters of the load, and the first six threads take nearly the whole load. The percentage of total load carried by engaged …