Category «Nut Bearing Area»
Calculating Required Thread Engagement – 1/18/21
Rules-of-thumb for thread engagement typically advise: For a steel nut member: 1 – 1 ½ times the fastener diameter should be engaged and for aluminum nut members: 2 – 2 ½ times the fastener diameter should be engaged. But these guidelines frequently result in over-designed joints and sometimes these full-thread lengths just aren’t available in …
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 …