Weld on filler cap assemblies comprising of a neck available in 2 lengths of, 30mm and 50mm, and the caps are available in either a knurled or scalloped finish.
The necks have an internal diameter of 38mm, the outside diameter is 44mm with a waisted section of 40.5mm OD at the bottom to provide a spigot location during the welding process.
The caps feature an O-ring for a positive seal.