Tnisesm 102-Piece 3/16" Brake Line Fittings Kit — Inverted-Flare Nuts & Unions, Corrosion-Resistant

The Tnisesm 102-piece 3/16" brake line fittings kit supplies a full assortment of inverted-flare nuts and unions to repair, extend, or join 3/16" brake tubing quickly and reliably.

This compact box groups every common inverted-flare brake-line fitting you’ll need for maintenance, restoration, or custom plumbing on cars, trucks, and SUVs that use 3/16" tubing. Rather than hunting single fittings or mismatched threads, this kit delivers organized, corrosion-resistant pieces in four thread sizes so you can match factory or aftermarket brake and hydraulic lines without delays.

Which parts are included and how are they organized?

The set contains 102 individual fittings tailored for 3/16" brake tubing: a high count of inverted-flare nuts plus several unions to join two lines. Components are sorted in a compartmented storage box so you can locate the correct thread size fast.

• 62 × 3/16" inverted tube nut (3/8-24 threads)
• 16 × 3/16" inverted tube nut (7/16-24 threads)
• 8 × 3/16" inverted tube nut (1/2-20 threads)
• 8 × 3/16" inverted tube nut (9/16-18 threads)
• 8 × 3/16" inverted tube union (3/8-24 threads)

What materials and finish protect these fittings?

Tnisesm fittings are manufactured from durable metal with a rust- and corrosion-resistant treatment designed for long service in under-vehicle environments. The finish extends part life compared with untreated fittings and helps maintain reliable sealing under normal automotive conditions.

• Durable metal construction for mechanical strength
• Corrosion-proof surface treatment to resist rust
• Consistent thread machining for accurate fit and seal

How do I use these nuts and unions during a repair?

Installation is straightforward for anyone familiar with brake-line work. Clean the tubing ends, fit the correct nut onto each tube, align the inverted flare, and tighten the union or connector with a wrench until snug. Always follow vehicle manufacturer torque guidance and safety practices when working on brake or hydraulic systems.

• Ensure tubing ends are free of burrs and contaminants
• Slip the nut onto each tube before flaring or joining
• Hand-start threads, then tighten with a wrench to recommended torque

Which vehicles and systems will this assortment fit?

This kit is built for standard 3/16" brake tubing using inverted or double flare connections, common on older and many modern cars, light trucks, and SUVs. It is also suitable for certain fuel or low-pressure hydraulic lines that use the same tube and thread standards. Confirm thread size and flare type before choosing a fitting.

• Compatible with most 3/16" inverted/double-flare brake lines
• Works for fuel or hydraulic lines that share those thread standards
• Useful for restoration, maintenance, and custom plumbing tasks

Who is this for: Professional mechanics, home DIYers restoring classic vehicles, and fleet technicians who want a ready supply of commonly used 3/16" inverted-flare fittings. The organized case keeps replacements on hand for roadside repairs, shop jobs, or parts bins so you can avoid downtime due to missing connectors.