Tnisesm Brake Line Fittings Assortment Kit — 102‑Piece 3/16" & 1/4" Inverted‑Flare, Corrosion‑Resistant

Tnisesm's 102-piece brake line fittings assortment supplies the nuts and unions needed to join or repair 3/16" and 1/4" inverted-flare brake tubing across common thread standards.

This organized kit collects a wide range of inverted-flare nuts and unions for 3/16" and 1/4" brake tubing, saving time when repairing or fabricating brake, fuel, or hydraulic lines. Each component is placed in a compartmented box for quick selection, and the fittings use corrosion-resistant finishes designed for long-term service on cars, trucks, and SUVs. The set covers both small replacement jobs and larger maintenance tasks by grouping thread sizes you’ll encounter on domestic and many import vehicles.

What fittings are included and how are they organized?

The kit contains 102 pieces made up of inverted-tube nuts and unions in seven thread types for the two tube diameters. Parts are sorted inside a plastic case so you can locate the exact thread and tube-size match without rummaging through loose hardware.

• 42 x 3/16" (3/8-24) inverted tube nuts, plus assorted 3/16" nuts in 7/16-24, 1/2-20 and 9/16-18
• 4 x 3/16" (3/8-24) inverted tube unions and corresponding unions for 1/4" sizes
• 30 x 1/4" (7/16-24) inverted tube nuts with additional 1/4" options in 1/2-20 and 9/16-18
• Compartmented plastic storage box for immediate access and inventory control

How durable are these fittings and what finishes are used?

The fittings are manufactured from robust metal with corrosion-resistant treatment intended to withstand exposure to road salt, brake fluid, and moisture. They are designed to maintain thread integrity and sealing surfaces during installation and service life, helping reduce rework and leakage risk when matched to the correct tubing and flare.

• Metal construction chosen for strength and reusability
• Special anti-corrosion process applied to resist rust
• Thread profiles machined for consistent engagement with inverted flare tube ends

Which systems and vehicles will these fittings work on?

This assortment is intended for standard 3/16" and 1/4" brake tubing using inverted- or double-flare fittings, common on many passenger cars, light trucks, trailers, and hydraulic or fuel-line applications. Compatibility depends on matching tube diameter and thread specification; always verify thread size and tube flare before assembly.

• Suitable for brake lines, fuel lines and small hydraulic runs
• Useful for domestic and many import models that use inverted flare fittings
• Great for shop spare parts, emergency repairs, and custom brake plumbing

How do I install these nuts and unions safely?

Installation requires clean, properly flared tube ends and a correctly sized wrench. Slide the nut onto each tube, align the inverted flares, and tighten to a snug, leak-free torque — avoid over-tightening which can deform flares or strip threads.

• Clean tubing and remove burrs before assembly
• Use the correct flare tool for inverted or double flares
• Tighten evenly and test for leaks under pressure after assembly

Who is this for: Tnisesm's 102-piece fittings assortment is aimed at professional mechanics, home DIYers, restoration enthusiasts, and fleet maintenance teams who need a broad selection of reliable inverted-flare nuts and unions on hand. If you frequently service brake or fuel lines, perform custom tubing work, or want a compact parts kit for roadside repairs, this set provides multiple thread sizes and a tidy storage solution to keep common fittings within reach.