This ZORO SELECT 5PWZ3 Bushing/Mandrel is designed to fit into the 10-32 internal thread size of the 5TUW2 and 5TUW3 fittings. It is a steel product made from steel materials. This bushing/mandrel set fits into the 10-32 internal thread size. You can use it with the 5TUW2 and 5TUW3 fittings. If you need a replacement for your broken or lost bushing/mandrel, this ZORO SELECT tool will come in handy.