minimum thread engagement – MobileTech Engineering

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 …

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 …