Worcester Bosch Retaining Screw 87186861090

The Worcester Bosch 87186861090 is a retaining screw from the manufacturer's bolts, nuts and screws group. It is used inside Greenstar Ri ErP Compact gas boilers, where it holds the component it is paired with firmly against its mounting point so the assembly cannot work loose during operation. Fasteners of this type carry load and vibration in service, so the thread and head condition matter as much as the size when a replacement is needed.

• The screw head is rounded, chewed or worn, so the correct driver no longer bites cleanly
• Corrosion, surface rust or pitting on the head or along the thread
• The fastener no longer clamps its component tight, allowing movement, rattle or misalignment
• The screw has seized in its thread and cannot be released without damaging the surrounding part
• Cross-threading or thread damage left behind by an earlier repair

• Check the GC number and serial plate on the appliance to confirm the model before ordering.
• Confirm part number 87186861090 against the fastener being removed; 1031195 is also listed for this item.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.