Worcester Bosch Screw 4.8mm x 30mm 87134030390

A 4.8mm x 30mm fixing screw supplied by Worcester Bosch as a set of three. It is a fastener used within the casing and internal assemblies of Greenstar gas boilers, holding components securely in position so they stay aligned under normal operating vibration and heat cycling. The screw is listed under the manufacturer's bolts, nuts and screws range and is used across a large number of Greenstar combi and system models.

• The screw head is rounded or chewed, so a driver no longer grips it properly
• The fixing is seized or corroded and will not turn without risk of shearing
• Rust staining or surface corrosion is visible on the screw or around the fixing point
• A screw is missing after previous servicing or component removal, leaving a panel or bracket loose
• The fixing has worked loose and no longer holds its component firmly in place

• Check the GC number and appliance serial plate to confirm the model before ordering
• Compare against the previous part numbers listed below, as older references may appear on existing documentation
• Confirm whether any gasket, seal or washer at the fixing point also needs replacing at the same time
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.