Worcester Bosch Hex Nut M8 Zinc Plated 29150110090

The Worcester Bosch 29150110090 is an M8 full hex nut manufactured in zinc-plated mild steel. It is a threaded fixing used to secure components and covers on Worcester Bosch CBI and SBI series appliances, where vibration and heat cycling make a correctly torqued, corrosion-resistant nut essential. The zinc plating protects the mild steel thread from surface rust in the damp conditions found around a boiler casing and combustion area.

• The hex flats are rounded or chewed, so a spanner or socket no longer grips cleanly.
• Visible corrosion or a white/grey zinc breakdown on the nut and the exposed thread.
• The nut has loosened under vibration, leaving a cover or bracket with movement.
• The thread has seized onto its stud or bolt and will not run off without damage.
• A fixing has been lost or dropped during a service or strip-down and needs matching.

• Check the appliance GC number or serial plate against the compatibility list to confirm the fixing is correct for your model.
• The previous Worcester Bosch number for this nut is ZGNUT028, and 1011161 may appear on older paperwork or stock records.
• Confirm the thread and quantity required against the assembly you are working on before fitting.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.