BOLT, PLUG, 14MM

14mm Plug Bolt for Honda Engines & Gearboxes

This 14mm plug bolt is a small but critical fastener used to seal service ports on many Honda powertrains. It’s commonly found on drain/fill points for oil, transmission fluid, or coolant passages, where a tight, leak-free closure is mandatory. A healthy sealing bolt helps keep your system clean, pressurized, and running at the right fluid level ✅

Why this part is needed

Every time you service fluids, the plug opening must be closed with the correct thread and seating shape. This bolt is designed to match Honda’s tolerances, so it tightens smoothly and holds torque without damaging the housing ?

How it works

When tightened, the bolt’s seat compresses against the case (often with a washer/gasket) to create a seal. Proper torque keeps vibration from loosening it and prevents seepage even under heat cycles and pressure changes ?️

What happens if it’s broken or worn

A rounded head, stretched threads, or a damaged sealing face can cause fluid leaks, low fluid level, burned components, or messy underbody stains. In worst cases, stripped threads can require expensive case repair. Replace at the first sign of leaking or damaged threads ?