Best Nickel Brake Fittings in 2026

Fit for: the unions measures approx. 0.6 x 0.9 inch, the nut measures approx. 0.67 x 3/8 inch, fit for most common inverted flare or double flare sizes for 3/16 inch tube, for use with 3/16 inch steel, poly coated or copper brake lines; Please confirm the size of the details according to the picture before purchasing

Size and material: both the unions and nuts are metric 3/8-24 threads (regular 3/16 inch tube fitting size), all brake line fittings are made of quality brass to prevent rust and plated for corrosion resistance

You will get: 12 pieces brake line fittings in the package, include 4 pieces unions and 8 pieces nuts, you can share them with your family and friends, these tubes unions are good fittings

Our 3/16 (M10x1.0 Inverted) brake line unions are made with unmatched superior quality

4LifetimeLines unions are made of durable brass which is resistant to corrosion from salt that can be used on roads in the winter

Suitable for brake hydraulic line union applications

★ 【Material】: Heavy Duty Brass,strong and durable. Dual couplings for joining two tubes of the same diameter(OD: Outer Diameter).

★ 【Firm And Durable】: Litorange Brass for corrosion resistance, high temperature ductility and low magnetic permeability.

★ 【Function】: Union for connecting and disconnecting two tubes more easily than with a coupling

PACKAGE INCLUDE -Part 1: MuHize upgraded 16 Fittings for 3/16”Brake Line: ① 2 x 3/16” (7/16-24) Inverted Tube Nut; ② 10 x 3/16" (3/8-24) Inverted Tube Nut; ③ 2 x 3/16” (1/2-20) Inverted Tube Nut; ④ 2 x 3/16"(9/16-18) Inverted Tube Nut;

PACKAGE INCLUDE - Part 2: MuHize upgraded 16 Fittings for 1/4”Brake Line: ① 2 x 1/4”(7/16-24) Inverted Tube Nut; ② 10 x 1/4” (7/16-24) Inverted Tube Nut (Long); ③ 2 x 1/4”(9/16-18) Inverted Tube Nut; ④ 2 x 1/4”(1/2-20) Inverted Tube Nut; Note：The nut threads are regular 1/4 inch tube fitting size. Please check before shopping!

HIGHER QUALITY - MuHize brake line fittings are made of durable material with unique rust corrosion proofing technology.

3/8-24 Threads (standard 3/16" tube fitting size)

702x3 Weatherhead

Includes Mounting Bracket

Type:1/2" Od x 1/2" NPT Thread Push to Connect Fittings; Body Style: Male Straight

1/2 inch tubing fittings Fluid Admitted: Air, Water (No Freezing)

1/2 npt push connect air brake Fittings Working Pressure:0-1.0mpa | 0-150psi; Proof Pressure:3.0Mpa | 435psi; Negative Pressure:-100Kpa | -29.5 In Hg

1/4 Union Straight Push to connect fittings Fluid Admitted: Air, Water, Steam ;Pressure: 2MPa | 290psi/ Applicable: Pipe PU/NYLON/Soft PE; Working Temperature:-20°C—120°C | -4°F—248°F

1/4 Push connectors Nickel Plated Brass - corrosion resistance, ductility at high temperatures, and low magnetic permeability; Seal: O-ring FKM(Viton)

These 1/4 quick connect fittings work great ,available in various styles and models ,good to suit your pneumatic piping needs perfectly, easy to connect and disconnect, a quick fix to your leaking problems.

Dual 3/8-24 in Inverted Flare Female to 1/8 in NPT Female

Brass

3/16 in Hardline

Unique Air Line Tubing Kit: The air brake fittings contains 2pcs 1/4” Unions, 2pcs 3/8” Unions, 2pcs 1/2” Unions; 2pcs 1/4” DOT Push-In × 1/8” MNPT, 2pcs 3/8” DOT Push-In × 1/4” MNPT, 2pcs 3/8” DOT Push-In × 3/8” MNPT, 1pc 1/2” DOT Push-In × 3/8” MNPT; 2pcs 1/4” DOT Push-In × 1/8” MNPT 90° Elbow, 2pcs 3/8” DOT Push-In × 1/4” MNPT 90° Elbow, 1pc 1/2” DOT Push-In × 3/8” MNPT 90° Elbow,

High-quality Material: Our push in fittings are made of high quality brass, with corrosion resistance, high temperature ductility and low permeability.

Technical Parameter: The Working Pressure is from Vacuum to 250 psi, the Working Temperature is from -40° F to +200° F.

PACKAGE INCLUDE - MuHize upgraded Brake Line Fittings Replacement (Pack of 15): ① 5 x 3/8-24 threads unions; ② 10 x 3/8-24 threads nuts. Note：Both the unions and nuts are 3/8-24 threads (regular 3/16 inch tube fitting size). Please check before shopping!

INVERTED FLARE UNION- Any 2 (3/16 inch) brake lines can be easy to joined with Muhize unions. both the sizes for unions and nuts are both 3/8-24 threads, which is the regular fitting size for 3/16 inch tube.

HIGHER QUALITY - MuHize brake line fittings are made of durable brass with unique rust corrosion proofing technology.

PACKAGE INCLUDE - MuHize upgraded Brake Fittings Replacement (Pack of 15): ① 5 x 3/8-24 threads unions; ② 10 x 3/8-24 threads nuts. Note：Both the unions and nuts is 3/8-24 threads (regular 3/16 inch tube fitting size) . Please check before shopping!

INVERTED FLARE UNION- Any 2 (3/16 inch) brake lines can be easy to joined with Muhize unions. both the sizes for unions and nuts are both 3/8-24 threads, which is the regular brake fitting size for 3/16 inch tube.

HIGHER QUALITY - MuHize brake fittings are made of durable brass with unique rust corrosion proofing technology.

Solid Brass Brake Line Adapter

7/16-24 To A Female 3/8-24 Inverted Flare

SAE Thread Size 7/16-24 Male, 3/8-24 Female

12 Piece 3/8 Inch-24 Threads Brake Line Fittings Assortment - for 3/16 Inch Tube (4 Unions, 8 Nuts)

These brake line fittings are made of durable brass to prevent rust and plated for corrosion resistance. Both the unions and nuts is metric 3/8-24 threads (regular 3/16 inch tube fitting size)

Intended for most common inverted flare/ double flare sizes for 3/16 inch tube, for use with 3/16 inch steel, poly coated or copper brake lines

Brake line adapter fitting is made from quality brass

Style is a 5/16 inch inverted flare union and is a straight style fitting

Sold in one set of 4 pieces

Auto Supplies Direct 3/16" Standard Inverted Flare Tube Nuts Pack of (15) for Cars and Trucks

For Automotive Brake Line Systems, Works With Your Preferred 3/16" Brake Line Of Your Choice

Most Common 3/16" SAE Inverted Flare / Double Flare Size

Adapts NPT male end to tube female end at a 90-degree angle.

Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability

For use with liquid petroleum (LP) and natural gas, refrigeration, hydraulic brake, trans-mission cooler lines, fuel, oil, air, lines, power steering.

Contain common air brake fitting styles

D.O.T Union:1/4"(4 pcs), 3/8"(4 pcs), 1/2"(4 pcs), 5/8"(2 pcs)

D.O.T Tee:1/4"(2 pcs), 3/8"(2 pcs), 1/2"(2 pcs); Bushing: 3/8" NPT Female x 1/2" NPT Male(2 pcs)

Union connect two tube with same 1/4" OD.

Quick disconnect simply push tubing in, no tools or loose parts to handle in tight places

Meets D.O.T FMVSS 571.106 ,CMVSS106 and SAE J1131 Air Brake system Requirements

Many different types available, including long, dual and tube styles

Corrosion-resistant brass design for a long service life

Also suitable for a broad variety of industrial and commercial uses

【PREMIUM MATERIAL】：Our push in fittings are made of high quality CA360 brass,Certified by DOT and Air Brake system Requirements,with corrosion resistance, high temperature ductility and low permeability. Great for long time use, dot air brake fitting pneumatic fittings type: 1/4"

【TYPICAL APPLICATION】：The air brake fittings assortment kit can be used with air systems, copper tubing in air lines brake systems, which is perfect for automotive car or truck repair,air operated seats, operating gauges, air horns, heater controls, industrial workshops, daily garden or lawn mower repair, towing machine hose connection and air brake connections .

【EASY TO BE INSTALLED】: Union connect two tube with same OD. All quick connect fittings can be sealed by pushing the tube firmly into the fittings and they are also simple to be removed from the tube.

[Fuel hardline fitting] : Only compatible with hard tube.6AN to 3/8 inch,the thread size of the 6AN is 9/16UNF.It's fits to 3/8" OD hardline,please measure before perchase.

[Material]: Made of aluminium alloy fitting and brass ferrule.Good corrosion resistance. There is no pollution in disposal, which is beneficial to environmental protection.

[Wildly Application]: This 3/8 hardline to 6an fitting is widely used in Brake System / Air & Fuel Delivery/ Engine Modification / Oiling System / Cooling System.

👉【Premium Material】: Our air line fittings are made of PBT Plastic, the air brake brass fittings DOT approved are made of high quality CA360 brass, with corrosion resistance, high temperature ductility and low permeability. Great for long time use.

👉【Quantity】: Unique dot air line quick connect fittings nylon tubing kit: The plastic tube fittings contain 28 pieces: 8 pcs Male straight push connectors, 6 pcs Straight tube unions. 6 pcs 90 degree Elbows. 4 pcs 90 degree Elbows NPT thread. 4 pcs Tube tees. The brass tube fittings contain 16 pieces: 5 pcs Male connectors. 5 pcs Male 90° elbows. 3 pcs Tube tees. 3 pcs Tube unions. Fit type: 1/2", 3/8", 1/4".

👉【Typical Application】: The push-to-connect fitting 1/4 inch are suitable for PU / PA / PE / PVC. The dot air fittings assortment can be used with air systems, and copper tubing in air brake systems. They are widely applied in automotive, manufacturing production lines, car or truck repair, industrial workshops, daily garden or lawn mower repair, towing machine hose connections and so on.

28 PCS (1/4", 3/8", & 1/2") D.O.T. Air Brake Line Fittings Brass Push to Connect Kit

Tee : 1/2" (2 Pcs), 3/8" (2 Pcs)

Union : 1/2" (2 pcs), 3/8" (2 pcs)

D.O.T. Compression style fittings for repairing truck and trailer air brake lines.

For Use in air brake Systems on semi-trucks, trailers, buses, mobile equipment and farm implements.

Ribbed sleeve for compression and positive grip.

【PREMIUM MATERIAL】：Our air brake fittings are made of high quality CA360 brass,Meets D.O.T FMVSS 571.106 ,SAE J1131 Air Brake system Requirements and Air Brake system Requirements,with corrosion resistance, high temperature ductility and low permeability. Great for long time use, dot air brake fitting pneumatic fittings type: 3/8" .

【EASY TO USE】: Union connect two tube with same OD. All dot air quick connect fittings can be sealed by pushing the tube firmly into the fittings and they are also simple to be removed from the tube.

【TYPICAL APPLICATION】：Air brake fittings assortment kit can be used with air systems, copper tubing in air lines brake systems, which is perfect for automotive car or truck repair,air operated seats, operating gauges, air horns, industrial workshops, air brake connections,towing machine hose connection and air brake connections or lawn mower repair.

👉【PREMIUM MATERIAL】: Our dot air brake fitting assortment is made of high quality CA360 brass, meets D.O.T FMVSS 571.106 and Air Brake System Requirements. With corrosion resistance, high temperature ductility and low permeability. Long service use, dot air brake fitting type: 1/8" 1/4", 3/8", 1/2", 5/8" .

👉【EASY TO INSTALL】: Our dot air line kit quicks disconnect simply push tubing in, need to use tools to fix loose parts to handle in tight places, so that use will be more firm and not easy to fall off. And pieces that contain a threaded end already have sealant pre applied to provide a secure connection.

👉【TYPICAL APPLICATION】: Air brake fittings assortment kit can be used with air systems, copper tubing in air lines brake systems, which is perfect for automotive car or truck repair,air operated seats, operating gauges, air horns, industrial workshops, air brake connections,towing machine hose connection and air brake connections or lawn mower repair.

Material: All brake pipe fittings are made of high-quality brass to prevent rust and plated to prevent corrosion.

3/16" Brake Line Fittings: 15 Fittings for 3/16" Brake Line: 5 x 3/8-24 threads unions; 10 x metric 3/8-24 threads nuts.

Size: The threads are 3/8 inch with a thread pitch of 24.

Available in many different styles including 3-way tees, elbows, unions, and more

Hard-wearing brass or steel construction for a long service life

A wide range of tube diameters and pipe sizes available

6 PCS BRASS TUBE TEE FITTING: 2 PCS 1/4 Inch & 2 PCS 3/8 Inch & 2 PCS 1/2 Inch;

6 PCS BRASS STRAIGHT UNION CONNECTORS: 2 PCS 1/4 Inch & 2 PCS 3/8 Inch & 2 PCS 1/2 Inch;

10 PCS BRASS 90°ELBOWS NPT THREAD: 2 PCS 3/8 Inch O/D × 3/8 Inch NPT & 2 PCS 3/8 Inch O/D × 1/2 Inch NPT & 2 PCS 1/2 Inch O/D × 1/4 Inch NPT & 2 PCS 1/2 Inch O/D × 3/8 Inch NPT & 2 PCS 1/2 Inch O/D × 1/2 Inch NPT;

【PREMIUM MATERIAL】：Our DOT air brake fittings are made of high quality CA360 brass,Meets D.O.T FMVSS 571.106 , Air Brake system Requirements,with corrosion resistance, high temperature ductility and low permeability. Great for long time use, dot air brake fitting type: 1/4", 3/8", 1/2"，1/8", 5/8" .

【 AIR LINE NYLON TUBING KIT】:The air brake fittings contain 44 PCS. 12PCS DOT Union , 6PCS DOT Tee , 4PCS Bushing, 8PCS 90⁰ DOT Male Elbow Connector, 8PCS DOT Straight Male Connector , 4PCS 45⁰ DOT Male Elbow Connector , 2pcs Compression Fittings 1/4" tube x 1/4" NPT Male. Fitting types: 1/4", 3/8", 1/2",1/8",5/8". All in a durable yet lightweight plastic storage container with flip lock tabs, rust and secure.

【EASY TO INSTALL】: Our dot air fitting kit quicks disconnect simply push tubing in, need to use tools to fix loose parts to handle in tight places, so that use will be more firm and not easy to fall off.And pieces that contain a threaded end already have sealant pre applied to provide a secure connection.