Ailbiuko 100Pcs 3/16" 1/4" Brake Line Fittings Kit(Nut and

Ailbiuko's 100-piece brake line fittings kit supplies a complete assortment of corrosion-resistant inverted flare nuts and unions for 3/16" and 1/4" brake tubing.

This kit collects the common inverted-flare sizes used on many automotive brake, fuel and hydraulic lines so you have the right nut or union on hand when you repair, replace, or re-route tubing. All fittings are plated for corrosion protection and are organized inside a compartmented box so you can find the part you need quickly.

Which fittings and thread sizes are included in this kit?

The kit bundles 100 pieces across multiple thread pitches to cover typical 3/16" and 1/4" tubing applications. It includes both nuts and unions so you can finish or join lines without searching for individual parts.

• 40 × 3/16" (3/8-24) inverted tube nuts
• 6 × 3/16" (7/16-24), 4 × 3/16" (1/2-20), 4 × 3/16" (9/16-18) inverted nuts
• 4 × 3/16" (3/8-24) inverted tube unions
• 30 × 1/4" (7/16-24), plus 4 × 1/4" (1/2-20) and 4 × 1/4" (9/16-18) nuts and 4 × 1/4" (7/16-24) unions

How durable and corrosion-resistant are these fittings?

The fittings are made from a high-quality metal and receive a plating finish to slow rust and improve longevity in harsh under-hood environments. They are designed to retain form and thread integrity under normal automotive temperatures and vibration.

• Plated finish for improved corrosion resistance
• High ductility metal suited to bending and installation stresses
• Manufactured threads to match common inverted-flare specifications

How do I install a nut and union from this kit?

Installation is straightforward for anyone familiar with brake or fuel tubing connections: prepare the tubing, thread the nuts, and tighten the union to secure the joint. Follow standard safety steps for brake system work.

• Clean tubing ends and deburr if needed
• Slide a nut onto each tube end before forming any flares or joining
• Bring the two pipe ends together, thread the union, and tighten with a wrench to proper snugness

What vehicles and systems will these fittings work with?

These inverted flare nuts and unions fit many typical automotive and light-truck brake and fuel line setups that use 3/16" or 1/4" tubing. They are common for replacement or custom line routing on cars, trucks, SUVs, and hydraulic accessories.

• Compatible with inverted or double-flare brake lines using 3/16" and 1/4" tubes
• Suitable for fuel system lines and other hydraulic tubing where specified
• Good for repairs, splicing, or prototype plumbing on vehicles and equipment

Who is this for? This Ailbiuko 100-piece fittings kit is aimed at DIY mechanics, professional technicians, restoration hobbyists, and fleet maintenance crews who want a well-organized assortment of common inverted-flare nuts and unions. If you frequently service brake or fuel lines, build custom hardline runs, or keep a parts bin for emergency repairs, this kit reduces trips to the hardware store and speeds up installations.