Hardline Coupler Union fittings

NZKW Australia Hardline Coupler Union Fittings | Olive Compression (No Flaring Required)

NZKW Australia Hardline Coupler Union Fittings are designed for fast, secure and reliable hardline joins without the need for flaring. Featuring an olive-style compression design, these fittings provide a strong mechanical seal on stainless steel tube, making installation quicker and cleaner in automotive, motorsport and industrial applications.

Ideal for fuel, oil and fluid transfer hardline systems, these couplers are engineered for durability and tested for high-pressure performance.

Features

• Olive compression design – no flaring required
• Fast and simple hardline installation
• Secure leak-resistant sealing system
• Suitable for stainless steel tubing
• Durable black finish for corrosion resistance
• Clean, professional hardline connections

Specifications

• Tested to: 300 PSI (with stainless steel tube)
• Pipe Sizes:
  • 1/2"
  • 3/8"
  • 5/16"
• Colour: Black

Why Buy This Product?

• Eliminates the need for tube flaring tools
• Speeds up hardline installation and fabrication
• Strong compression seal for high-pressure systems
• Ideal for workshop and professional builds
• Clean, compact design for tight engine bays
• Reliable performance under demanding conditions

Ideal For

• Fuel hardline systems
• Oil and lubrication lines
• Brake system fabrication (where applicable)
• Custom automotive builds
• Motorsport and track vehicles
• Workshop plumbing and repairs

NZKW Australia – Trusted Local Supply

NZKW Australia is proudly based on the Gold Coast and supplies high-quality hardline fittings, AN systems and performance plumbing components to workshops and enthusiasts across Australia. We ship Australia-wide, ensuring reliable solutions for professional and custom applications.

Orders are dispatched within 24 hours, unless stated otherwise at time of ordering.

Online Only: 24 to 48 hours delay, but in some cases up to 5 days, depending on the product and third-party shipping.

Pre-order: Available only for items in transit to our Australian warehouse. Estimated dates depend on third-party shipping.

Special Order: Products we manufacture or need to restock. Average time is 3-5 weeks, but may vary depending on third- party shipping