Reducing Stud

A reducing stud is a threaded rod with different thread sizes at each end. It joins two threaded parts that do not share the same thread size.

A reducing stud joins two parts with different thread sizes. It often takes a nut on each end that matches the respective thread. A spanner or socket sets it.

Hot dip galvanising gives a thick zinc coating for outdoor or wet service. Plain finish has no coating and suits dry indoor use. PTFE coating lowers friction for easier tightening and removal.

This kind of stud is often made in stainless steel 304 or 316 for corrosion resistance. It can be made in high tensile steel, mild steel or brass. Stainless steel 316 suits marine or chemical exposure better than 304.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a mill test certificate or certificate of conformance for the material and finish. On receipt, check the thread sizes at both ends and the overall length. Look for damaged threads or coating defects.