Best Adapter Fitting Nuts in 2026

Type: Compression Union

Tube Size:3/8" OD

Materies: BRASS

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

Hex plug with SAE 45-degree flare male end terminates tube size fitting

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

For use with LP and natural gas, refrigeration, and hydraulic applications

FAUCET HOSE FITTING: Faucet stop valve allows for a quick and easy connection with bathroom and kitchen sink faucets, and can be used in tight spaces

BURST PROOF AND LEAK FREE: Faucet shutoff valve provides a secure connection, is equipped with full-flow brass barbs which provides an increased water flow, and is designed to resist against bursting and leaks

EASY TO INSTALL: Stainless steel supply line shut off valve allows for quick and easy installation, and does not require any soldering, glue, or crimping

Includes 10 Steel Tube Nut, 3/16, M10x1.0 Inverted, per bag

Our brake line tube nuts are made with unmatched superior quality

Plated for corrosion resistance

Three piece construction - nut, sleeve and body with attached insert

Use with copper, brass, aluminum, or plastic tubing

Standard fittings use short nuts

Everflow product code 27112-NL

12 inch lead free flexible faucet supply line

Stainless Steel braided hose with Chrome Plated Brass nuts

P-TRAP KIT: P-trap keeps your home safe by preventing sewer gas from escaping out of your bathroom plumbing fixtures or drains

EASY INSTALLATION: Kit includes all the necessary nuts and washers you need for easy installation

1 1/4" INLET AND OUTLET: 1 1/4" inlet and outlet ensure a perfect fitting connection

Male National Pipe Taper (NPT) threads on male threaded pipes and fittings

Made of stainless steel 304 for better strength

Preventing rust processes and for the whole body

★ 【Material】: Solid Brass construction. Durable Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability.

★ 【SIZE】: 3/8" Hose Barb x 3/8" Hose Barb.Thru-Bulk Bulkhead Fittings is connect with 3/8" ID hose with the same size.

★ 【Introduction】: Smooth surface and inner wall, durable Light and Small. Exquisite craftsman makes it safe and reliable.Bulkhead union coupling for connecting two hoses with the same diameter in a straight run.Barbed fitting for a tight seal on hoses.

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.

Made of stainless steel 304, heavy duty, durable and corrosion resistant.

1/4" outer diameter tube

Fittings for connecting and extending stainless steel, copper, rigid and semi-rigid plastic tubing

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.

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

Size: 1/4”Barb x 1/4”Barb

Material: 304 stainless steel,heavy duty,last for long lifetime,resistant to corrosion,low magnetic permeability.

Bulkhead union coupling for connecting two hoses with the same

Features stainless steel bolts and washers and large plastic wing-nuts.

#8 Winter Plug with Valve for 1-1/2 Inch Pipe, with Blow Thru Valve

Includes blow through fitting to assist with blowing out or winterizing pipe.

Most common SAE inverted flare sizes

Steel Brake Line Tube Nuts for 3/16" Steel Brake Line Tubing Inverted Flare Standard 3/8"-24 thread

SAE 3/16 tube size x 3/8-24 thread size

SIZE - 1/2" Tube OD x 1/2" Tube OD, Compression Tube Fitting mainly consists of a fitting body with a 24 degree tapered hole, a ferrule with a sharp inner edge, and a nut for compression.

MATERIAL - Made of high-quality brass, with strong wear and corrosion resistance, high compressive strength, durability, low magnetic permeability and high temperature ductility.

Use - Suitable for oil, gas, water and other non-corrosive or corrosive pipeline systems, temperature and pressure resistance, good sealing and repeatability, no need for welding and flaring tools, easy disassembly, installation and maintenance, etc.

[Thread Size] The thread size of 3an is 3/8-24 UNF,tube sleeve used to 3/16'' OD inch stainless steel tube.

[Installation] Need to install the tube nut on the tubing first,followed by this tube sleeve.Then use a 37° flaring tool to flare the end of the coiled aluminum tube.Professional installation recommended.

[Function] The nut is used for the conversion of the hard pipe and the fitting,the sleeve is used to fix the aluminum pipe and prevent it from moving, and the sleeve is sealed with a 37 degree and an outer flaring of the aluminum pipe.

Type: Standard 3/8" Tube OD (Compression) male to 3/8" Tube OD (Compression) male.Compression nuts and ferrules included.5pcs

Reducing adapter for different size tube pipes or fittings,Both fitting connects to tubing end.

Tube OD Compression Straight Coupling Adapter for converting Aluminum, Plastic, and Copper straight compression thread pipe Tubing.

JIC -3AN Dash Size 3 AN 3 SAE thread, 1/16" ID sleeve, for 3/16" O.D. tube, hex replacement auto parts

-3 AN, package with 1-Nut and 1-Sleeve

Manufacture from lightweight 6061 t6 cnc machined aluminum alloy

【Perfect Matching】--You will receive a 3/4" straight elbow conduit fitting set containing 20 pieces of straight and 10 pieces of elbow connectors, a total of 30 pieces.

【High Quality Material】--These liquid tight connectors are mainly made of high quality PVC and iron lock plate, not easy to break or deform, reliable and safe to use, and can serve you for a long time.

【Product Advantages】--Corrosion resistance, abrasion resistance, oil resistance, water resistance, acid resistance, metal chip resistance and harsh environment; resistance to abuse, pulling and squeezing; outdoor, sunlight resistance, direct burial, 50% lighter than metal conduit.

Material: Brass; External Thread: M14; Internal Thread: M12; Thread Pitch: 1mm; Height: 10mm / 0.39 inch; Packing List: 5 x Brass Thread Adapter

Advantage: The product is made of brass material, providing good durability and stability. Convenient to use, it can convert two different thread.

Instruction: All threads body is very easy to use, just thread it into a nut or thread pipe.

ENHANCED QUALITY BRASS Makes our Locknut 3/4" Resistant to Corrosion and Safe for High Temperatures

CONVENIENTLY DESIGNED TO CONNECT Pipes or Fittings of Different Diameter, Material, and End Type. Our Metal Hose Vacuum Gauge Locknut Washer 3/4" Have 0,75 inch Female Threads.

RELIABLE FITTING of the Bushing Reducer is Provided by the Well-Machined Threads and the Relative Softness of the Brass that Enables Tighter Sealing. Easy to Install or Change. Doesn’t Leak!

Package Qty : 1 Piece Fitting + 2 Nuts

Material : Copper

Size : 3/8"

Saddle is solvent welded into existing line and secured with fixture components

Includes necessary metal V-bolts, washers, and nuts for secure attachment

For tapping into 3 in. or 4 in. Schedule 40 DWV line

Exceptional flexibility for fast, easy installation - Heavy-duty brass hex nuts are easy to grip and nickel plated for durability

High Efficiency Washing Machine Connector's wider inner diameter allow for faster filling and maximum energy efficiency

Exceeds code requirements for flexible water connectors

Color: Golden; Material: Brass; Thread: G1/2 Male x M14*1.5 Male; Hole Dia: 8mmx14mm/0.31x0.55inch(ID*OD), suitable for connecting 8mm(OD) copper pipe; Total Size: 39x30x21mm/1.54x1.18x0.83inch(L*W); Packing List: 2 x Brass Pipe Tube Adapter

Advantage:The tube coupler is made of brass, it is durable and reusable.; tube fitting comes with brass connector, brass sleeve, and nuts in one set, which allows you to connect pipe easily.

Instruction:1. Insert the copper pipe with the corresponding diameter into the brass nut, and slide the brass sleeve up to the nut on its threaded side. ; 2. Put the tubing into the connector, and install and fix the pipe to the brass connector with a spanner.

Color: Golden; Material: Brass; Thread: M12*1.25mm; Hole Dia: 6 x 6 x 8 x 8mm/ 0.24 x 0.24 x 0.32 x 0.32 inch, suitable for connecting 6mm,8mm(OD) copper pipe..;Total Size: 43.2 x 43.2 X 15mm/ 1.7 x 1.7 x 0.59 inch(L*W*H); Packing List: 1 x Flared Pipe Tube Adapter

Advantage: The tube coupler is made of brass, it is durable and reusable. Flared tube fitting comes with flared brass connector and nuts in one set, which allows you to connect pipe easily.

Instruction: Insert the copper pipe with corresponding diameter into brass nut,then flare the copper pipe. Install and fix the pipe to the brass connector by spanner

Name: 3/8" Tube OD compression fitting

Working Pressure: 2900psi / 20MPa

Temperature Range: -50-450℃ / -58℉ -842℉