Worcester Bosch Hex Head Screw 4.8 87134030360

The Worcester Bosch 4.8 hex head screw, part number 87134030360, is a threaded fixing used in the assembly of Worcester Bosch Greenstar gas boilers. It is a hex head fastener, driven with a socket or spanner rather than a screwdriver, which makes it suitable for positions where access is tight and torque needs to be controlled. It is a service item rather than a functional component: it holds covers, brackets, plates and internal assemblies in place so that the boiler's working parts stay correctly located.

• The hex head is rounded or chewed, so a socket or spanner no longer grips it properly.
• The thread is corroded, cross-threaded or stripped, and the screw will not tighten to a firm hold.
• The screw has seized in its hole and shears during removal, leaving the shank behind.
• A cover, bracket or plate held by the screw is loose, rattling or sitting proud of its seating.
• The screw is missing altogether after previous work, leaving the fixing point open.

• Check the GC number on the appliance data badge against the compatibility list to confirm the screw is the correct fixing for your model.
• Confirm the part number 87134030360 or the alternative number 1012799 before ordering, as several similar hex head fixings are used across the Greenstar range.
• If the screw is being replaced as part of a larger repair, check whether any gasket, seal or washer at that joint also needs renewing.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.