Link to inserts
nut and bolt version www.ebay.co.uk...
rivet version www.ebay.co.uk...
This video shows how I repair the Mamod boiler. The repair kit is available in both nut/bolt and rivet versions. You will find them for sale on ebay, look for my user name 'maninshed'. The inserts are made of brass and hand turned on my lathe. The repair is easy to carry out with a few simple tools.