Please choose which thread you want

Jackmaster - Steel centre nut 13/16" or 3/4", etc thread designed for standard Chinese anodised sandwich adaptors. Outside diameter of shank is 24mm. Photo of blue adaptor shows the type of adaptor this item fits. This item has been made to be a good tolerance fit in the silver oil cooler adaptor shown in the photo gallery so some standard sandwich adaptors may be a little tight and may require scraping out a little to allow good fit. Special sizes are available on request. Superior quality. Ask for a quote on specials. Please give us details of your size. We can make to order.