Castle nut M10x1. Porsche 356  ›  90007900303

Castle Nut M10x1
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The OE Match Castle Nut M10x1 is a replacement castellated fastening nut for selected Porsche 356 suspension applications.

Fits:

• Porsche 356 1950-55
• Porsche 356A 1955-59
• Porsche 356B 1959-63
• Porsche 356C 1963-65

Featuring an M10x1 fine thread and slotted design for split-pin retention, it helps maintain secure fastening of suspension components.

What Does It Do?

The castle nut secures suspension components to their mounting points.

Its castellated slots allow a split pin to retain the nut, helping prevent loosening during vehicle operation.

Why Does It Fail?

Common causes include:

• Corrosion and age-related deterioration
• Damaged or worn threads
• Overtightening during installation
• Deformed castellated slots
• Damage during removal or servicing

When Should It Be Replaced?

Replace if the nut has damaged threads, corrosion, deformation or worn locking slots.

Replacement is also recommended when the existing nut cannot be securely retained with the correct split pin.

Checks & Installation

Inspect the mating threads and mounting components for wear or damage.

Tighten to the appropriate Porsche workshop specification and secure with a new split pin where required.

Do not reuse damaged fastening components or substitute an incorrect thread size.

Key Features

• OE Match replacement castle nut
• M10x1 fine-thread specification
• Castellated design for split-pin retention
• Suitable for selected Porsche 356 suspension applications
• Ideal for classic Porsche restoration and servicing

Porsche 356 Suspension Castle Nuts & Replacement Fasteners

Correct suspension fasteners are essential for maintaining secure mounting connections on classic Porsche 356 vehicles.

The OE Match M10x1 Castle Nut provides a replacement for selected front shock absorber mounting and rear camber compensator applications.

Its castellated design allows positive mechanical retention using the appropriate split pin.