Description
Overview:
Genuine Villiers big end nuts for connecting rods, OEM No. 31129. These durable steel hex nuts secure the connecting rod cap to the con-rod on classic Villiers petrol engines, keeping the big end tight under vibration and heat. They are designed for a precise fit on engines such as the MK10 and MK12, helping maintain reliable running and reducing the risk of rod-cap movement during operation. Supplied as unused vintage old stock, they may show light tarnish from storage but remain fully serviceable. Ideal for maintenance and restoration of Villiers-powered garden machinery, stationary equipment, and compact industrial tools where dependable engine fastening is essential.
Key Features:
- Genuine Villiers part for assured compatibility and reliability (OEM No. 31129)
- Lock-nut style to resist loosening from vibration and engine cycling
- Steel construction for strength and temperature resilience in the crankcase area
- Accurate threads for a secure seat on the connecting rod bolts
- Helps keep the big-end assembly clamped, supporting consistent engine performance
- Direct like-for-like replacement with no modifications required to standard rods/bolts
- Suitable for routine servicing, rebuilds, and period-correct restorations
- Unused old stock; minor storage tarnish or marks may be present only
Typical Applications:
Used during engine overhauls, con-rod replacements, or preventative maintenance on Villiers petrol engines. Suitable for vintage mowers, cultivators, pumps, generators, and other machinery powered by Villiers units, where maintaining a secure big end is critical to prevent bearing damage, noise, or catastrophic engine failure.
Also known as:
Big-end cap nuts, con-rod nuts, connecting rod retaining nuts, engine lock nuts, rod fasteners, big-end fixing nuts, crank/rod cap nuts, engine fastening nuts.
Fits Models:
C12, C25, MK10, MK12, MK15, MK20, MK25
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