The Nut M4 A2 (Part #1104504) is a precision-engineered BFC component designed to ensure the structural integrity and reliable operation of your espresso machine. This high-quality nut provides a secure, vibration-resistant fastening for internal assemblies, preventing mechanical play that can lead to pressure fluctuations or component wear. By maintaining tight tolerances and stable connections, this genuine BFC part directly contributes to consistent machine performance and superior extraction quality for every shot.

This is a genuine BFC component compatible with the following machine models:

• Classica
• Classica Eva
• Lira S

Installation of the 1104504 Nut M4 A2 should be performed during routine maintenance or when replacing associated hardware within the machine. To ensure a safe repair, always verify that the espresso machine is fully powered off, depressurized, and completely cooled before beginning any work. Simply replace worn or damaged fasteners with this OEM part to restore factory-standard stability. For guaranteed compatibility and professional results, shop at Kaldi.com for all your authentic BFC replacement parts and espresso equipment needs.