External Hex Imperial O-Ring Port Plug From:

External Hex Plug

Our External Hex Plug is engineered for reliable sealing performance across a wide range of automotive and motorsport applications. Featuring a 1/2 UNF thread, this versatile plug is designed to seal using either a washer or an O‑ring, delivering flexibility for varied system requirements.

Commonly used in master cylinders, fuel pumps, oil system ports, and other hydraulic or fluid-control components, this plug ensures dependable sealing and long‑term durability.

Each unit is precision‑machined from high‑quality 6061‑T6 aluminium and finished with hard‑coat anodising to maximise corrosion resistance, surface hardness, and wear protection.
Proudly manufactured in Australia at our facilities in Taree, NSW, this plug reflects our commitment to quality, performance, and local craftsmanship.

Key Features

• 1/2 UNF threaded external hex plug
• Compatible with washer or O‑ring sealing
• Ideal for master cylinders, fuel pumps, oil ports, and fluid system applications
• Manufactured from 6061‑T6 aluminium for strength and lightweight performance
• Hard‑coat anodised for enhanced durability
• Australian‑made at our Taree, NSW facility
• Precision‑machined for consistent fit and high performance