SKU: N91099101
Audi Genuine M6 Socket Head Bolt - N91099101

Hardware Specifications

• Type: Socket head bolt with an inner multipoint (triple square/spline) or Torx drive head, depending on the revision. It is also classified broadly as a flange bolt or hardware screw.

• Thread Size: M6

• Length: 20mm

Common Applications

This is a general-purpose mounting fastener used extensively across a wide range of Audi and Volkswagen vehicles (including 1.8L, 2.0L, and 3.0L engines). It is most frequently used to secure engine hardware, cooling components, and electrical sensors, including:

• Cooling System: Securing the engine water pump, water pump outlet pipe, coolant flange, thermostat housing flange, or radiator coolant hose brackets.

• Engine Hardware: Securing the PCV system / oil separator, upper engine cover, or oil pump chain tensioner.

• Exhaust & Turbo: Mounting turbocharger boost pressure safety switches, cut-off valves, and catalytic converter heat shields.

• Sensors: Mounting the cruise control distance sensor (radar unit) or various HVAC control valves and solenoids.

Note: Depending on the specific component it is being removed from, this hardware can sometimes be designated as a "torque-to-yield" (stretch) bolt, meaning it is recommended to replace it with a new one rather than reusing it during reassembly.

• Brand: Audi

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