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

Tnisesm's 102-piece brake line fittings kit supplies assorted 3/16" inverted-flare nuts and unions for quick, reliable connections on automotive brake, fuel, and hydraulic lines.

This organized fitting set is built for mechanics, restoration hobbyists, and DIY vehicle owners who work with 3/16" brake tubing. Packed in a labeled box, the kit contains multiple thread sizes and union pieces so you can repair, extend, or join brake lines without hunting down individual parts. The components use a corrosion-resistant finish intended to extend service life in demanding under‑hood and under‑car environments.

What comes in the kit and how is it organized?

The kit includes 102 pieces arranged for fast selection: inverted-tube nuts in four common thread sizes plus matching inverted unions for joining two lines. Each type is grouped within the box so you can identify and count parts at a glance.

• 62 x 3/16" inverted tube nuts, thread 3/8-24
• 16 x 3/16" inverted tube nuts, thread 7/16-24
• 8 x 3/16" inverted tube nuts, thread 1/2-20
• 8 x 3/16" inverted tube nuts, thread 9/16-18
• 8 x 3/16" inverted tube unions, thread 3/8-24

Are these fittings compatible with my vehicle’s brake or fuel lines?

These components are designed for 3/16" tubing using inverted-flare or double-flare connections, a common size on many cars, trucks, and SUVs. They work with brake, fuel, and other low-to-medium‑pressure hydraulic lines when the thread and flare type match.

• Best for systems specified as 3/16" tubing and inverted/double flare ends
• Check thread pitch (3/8-24, 7/16-24, 1/2-20, 9/16-18) for compatibility
• Not intended for high-pressure specialty hydraulic systems without verification

How do I install a nut or union from this set safely?

Installation is straightforward when following standard brake-line practices: clean tube ends, slide on the nut, seat the flare, then tighten to the vehicle maker’s torque spec. Use appropriate wrenches and avoid overtightening; replace any damaged flares to ensure a leak-free seal.

• Clean tubing and inspect flares before assembly
• Slide nut over tube end, form proper inverted or double flare as required
• Join using a union or mating fitting and tighten with wrench to spec

What materials and corrosion protection do these fittings use?

Each piece is fabricated from a durable metal with an anti-corrosion treatment designed to resist rust in common automotive conditions. That finish helps maintain sealing surfaces and allows longer service life than untreated fittings in humid or salty environments.

• Durable metal construction for mechanical strength
• Specialized corrosion-resistant coating applied to parts
• Intended to preserve thread and sealing surfaces over time

Who is this for? The Tnisesm 102-piece brake line fittings kit is ideal for professional mechanics stocking assorted inverted-flare hardware, restoration enthusiasts rebuilding brake or fuel systems, and DIYers who prefer having common sizes on hand. If you work regularly with 3/16" tubing and need a convenient, labeled assortment for repairs, modifications, or emergency field work, this kit provides a compact, service-ready selection of nuts and unions to speed up installations and minimize trips to the parts store.