Slimline Metric Port Plugs with O-ring

NZKW Australia Slimline Metric Port Plugs – O-Ring Seal (M12–M18)

The NZKW Australia Slimline Metric Port Plugs are precision-engineered sealing solutions designed for clean, reliable closure of unused metric threaded ports in performance engines, cooling systems, and fluid circuits. Featuring an integrated O-ring seal, these low-profile plugs provide a secure, leak-free fit while maintaining a sleek, compact finish in tight engine bay environments.

Ideal for engine builders, fabricators, and performance workshops, these slimline port plugs are perfect for sealing coolant ports, oil galleries, sensor ports, and custom plumbing setups in street and motorsport applications.

What's Included

• 1 x NZKW Australia Slimline Metric Port Plug (O-Ring Included)

Specifications

Type: Slimline Metric Port Plug
Sealing Method: O-Ring Seal
Material: High-strength aluminium alloy (anodised finish)
Design: Low-profile / Slimline

Available Sizes:

• M12 x 1.25
• M12 x 1.5
• M14 x 1.5
• M16 x 1.5
• M18 x 1.5

Key Features

• Precision-machined slimline design for tight engine bay fitment
• Integrated O-ring for reliable leak-free sealing
• Clean OEM-style finish for professional installations
• Ideal for blocking unused fluid, oil, and coolant ports
• Lightweight aluminium construction
• Corrosion-resistant anodised finish for durability
• Suitable for high-performance and motorsport applications
• Easy installation and removal for maintenance or upgrades
• Multiple metric sizes to suit common engine platforms

Compatible With / Applications

• Engine coolant ports
• Oil gallery and block-off ports
• Sensor and diagnostic ports
• Turbocharged and naturally aspirated engines
• Custom engine builds and swaps
• Fabrication and engine bay clean-up
• Fuel, oil, and coolant system modifications
• Drift, drag, circuit, rally, and street vehicles
• Performance workshops and motorsport teams

Built for Performance & Reliability

The NZKW Australia Slimline Metric Port Plugs are designed to provide a clean and dependable sealing solution for unused threaded ports in high-performance environments. With their integrated O-ring design and compact profile, they ensure leak-free operation while maintaining a professional, minimal engine bay appearance.

Why Choose NZKW Australia?

🇦🇺 Australian owned and operated
🏁 Years of proven motorsport development and real-world track testing
✅ Trusted by performance workshops, race teams, and enthusiasts
Precision-engineered, premium-quality components built for reliability
🚚 Fast Australia-wide shipping
Designed for street, drift, drag, circuit, rally, and off-road applications
Backed by expert product knowledge and local suppor