Garden Hose Thread Size

¾”–11.5 NH or NHR is the standard thread size for most residential garden hoses, outdoor faucets, nozzles, sprinklers, and hose accessories in the United States. You may also see it sold as GHT, GHM, or GHF. The ½-inch, ⅝-inch, or ¾-inch number printed on a hose usually describes the hose’s inside diameter, not the threads at its ends.

Use this table to separate hose threads from pipe threads and hose diameter before buying an adapter.

What You’re Identifying	What It Means	What to Buy or Match
Standard garden hose, faucet, nozzle, or sprinkler connection	¾”–11.5 NH or NHR	A garden-hose-thread fitting, often labeled GHT
Pipe fitting	NPT	An adapter with NPT on the pipe side and garden hose thread on the hose side
Hose marked ⅜-inch, ½-inch, ⅝-inch, or ¾-inch	Hose inside diameter	A repair coupling with a tail sized for that hose diameter
Female hose swivel nut	Internal threads	A male garden-hose-thread outlet
Male hose coupling	External threads	A female garden-hose-thread inlet

What Garden Hose Thread Size Means

Garden hose thread is the threaded connection that lets a hose attach to a faucet, sprinkler, spray nozzle, splitter, timer, or another hose. A typical hose has a female swivel coupling at one end and a male threaded coupling at the other.

The female end has threads inside a rotating nut. It screws onto the male threads on a faucet, hose end, or accessory. The washer inside that female swivel nut makes the seal.

The standard designation has two useful parts:

¾-inch is the nominal hose-thread size.
11.5 is the thread pitch, meaning 11.5 threads per inch.

A fitting’s outside nut, collar, or handle may be much wider than the nominal thread size. Do not measure the outside of a plastic or brass swivel nut and assume that measurement identifies the thread.

Garden-hose terminology can vary by package:

GHT means Garden Hose Thread.
GHM means Garden Hose Male.
GHF means Garden Hose Female.
NH and NHR are hose-thread designations; NHR is commonly used for rolled or formed garden-hose threads.

The federal thread handbook groups hose-coupling and fire-hose-coupling categories under NPSH and NH. It lists NPT separately as a taper pipe thread, which is why a pipe fitting and a hose fitting with similar nominal sizes are not automatically interchangeable.

How to Choose the Right Garden Hose Thread Adapter

Match the complete thread designation and the gender of both mating ends, not just the nominal size.

Use the following steps before ordering an adapter or taking a fitting to the hardware store.

Step 1: Identify the Two Parts You Need to Join

Turn off the water at the faucet before removing an existing hose or fitting.
Look at the threads on each part: external threads are male, while internal threads inside a nut or collar are female.
Identify whether each side is a garden-hose connection or a pipe connection.

Do not rely on color, material, or whether the fitting is brass or plastic. Those details do not identify the thread standard.

Step 2: Match Standard Garden Hose Threads

For a standard residential hose connection, choose a coupling marked ¾”–11.5 NH or NHR. GHT is the common retail shorthand for the same garden-hose fitting standard.

Choose the thread gender based on the part you already own:

Buy a male GHT fitting when it must screw into a female hose swivel.
Buy a female GHT fitting when it must receive a male hose end.
Buy a hose repair fitting with a barb or tail sized for the hose’s inside diameter, plus the correct male or female hose-threaded end.

Start threaded parts by hand. If the fitting will not turn smoothly for the first few turns, remove it and realign it. Forcing a crossed thread can ruin a faucet outlet, timer, splitter, or hose coupling.

Step 3: Use a Combination Adapter for Pipe Connections

An NPT fitting is a pipe fitting, not a standard garden-hose fitting. NPT threads are tapered so they tighten as they screw together.

When joining a pipe fitting to a hose, buy an adapter with:

The correct NPT gender and size for the pipe-side fitting.
The correct male or female garden-hose thread on the hose side.

A package may list both standards, such as “NPT x GHT.” That is what you want when converting from plumbing pipe to a hose connection. A fitting labeled only NPT is not the right choice for directly attaching a normal garden hose.

Step 4: Install the Fitting and Test the Seal

Make sure the female hose coupling contains a flat rubber washer.
Thread the connection together by hand until snug.
Avoid overtightening plastic swivel nuts, timers, and splitters.
Turn on the water slowly and watch the connection for drips.
If water leaks from the face of the coupling, turn off the water and inspect or replace the washer.
If the threads bind, stop and confirm the thread type and gender rather than using more force.

Thread tape does not replace a missing hose washer. A pipe-threaded connection may need a sealant method appropriate for that pipe fitting.

Garden Hose Diameter Is Not Thread Size

A hose marked ½-inch, ⅝-inch, or ¾-inch is describing the inside diameter of the water passage. A larger inside diameter can carry more water.

Most common garden hoses use one standard end-thread size even though the rubber hose body comes in several inside diameters. That is why a ⅝-inch hose can attach to the same faucet, nozzle, and sprinkler as a ¾-inch hose.

To identify the hose diameter for a repair coupling:

Disconnect the hose and let it drain.
Measure across the open inside of the rubber hose, not across the outside of the metal or plastic coupling.
Match that measurement to the repair coupling’s barb or tail size.

A hose-end repair fitting must also have the thread type needed at the outer end.

Rain Barrel, Irrigation, and Pipe Fitting Cases

Rain-barrel and irrigation connections require checking each fitting’s thread system, since hose thread, NPT, barbs, and proprietary fittings can be combined.

Rain Barrel Spigots

For a rain-barrel outlet that accepts a standard garden hose, use a ¾-inch hose-bib spigot. A ½-inch spigot can also work, but it needs a smaller locknut and washer; confirm the exact locknut and washer size required by the spigot before drilling or assembling the barrel.

The hose-facing end needs male garden-hose-compatible threads so the hose’s female swivel can screw onto it. The barrel-facing hardware is a separate connection, so verify that the spigot, locknut, washer, and barrel wall thickness work together.

Rain Barrel Overflow Outlets

A useful overflow setup uses a ¾-inch brass overflow valve with male threads on both ends. The outside male end accepts the female end of a garden hose, allowing you to direct overflow away from the barrel and nearby beds.

For the overflow hardware in its rain-barrel guide, Nashville Water Services identifies a shopping label of “male hose MIP adapter ¾ x ¾ x ½.” Treat that label as a description of the adapter’s separate connections, not as proof that every threaded end is garden hose thread.

Drip Irrigation and Plumbing Adapters

Irrigation systems often combine hose thread, pipe thread, tubing barbs, and proprietary fittings. A hose timer or hose-end filter commonly uses garden hose thread, while a rigid plumbing connection may use NPT.

Read both ends of an adapter before buying it. “Female” and “male” alone are not enough; check the thread-system label on the package.

How to Confirm Fit and Prevent Leaks

Before leaving a fitting installed, check these points:

The thread type matches on both sides.
The threads start straight and turn easily by hand.
The fitting does not drip when water is turned on slowly.
The hose is not pulling sideways on a timer, splitter, faucet, or rain-barrel outlet.

Keep spare hose washers near your faucet, greenhouse, or irrigation supplies. Most garden-hose leaks at the connection come from a flattened, cracked, missing, or misplaced washer rather than from the hose threads themselves.

Disconnect hose accessories carefully at the end of the season or before moving equipment. Pulling a hose away while the coupling is still threaded on can damage the swivel nut, the washer, or the faucet threads.

Before buying an adapter, take a clear photo of both ends you need to join.

Frequently Asked Questions

Is ¾ NPT the same as garden hose thread?

No. NPT is a tapered pipe-thread category, while standard garden-hose fittings use hose-coupling threads that seal with a washer. A nominal size can look similar on a package, but use an NPT-to-GHT adapter when connecting plumbing pipe to a garden hose.

How Can I Tell Whether My Hose Is ⅝-Inch or ¾-Inch?

Measure the inside opening of the rubber hose after removing or inspecting the hose end. A ⅝-inch hose has a smaller water passage than a ¾-inch hose, but both can use the same standard garden-hose-thread accessories.

Are Garden Hoses ¾-Inch or ½-Inch?

Garden hoses are available in ½-inch and ¾-inch sizes, as well as ⅜-inch and ⅝-inch sizes. Those measurements describe the hose’s inside diameter and water capacity, not the thread size at the coupling.

What Is a Garden Hose Fitting Size?

For most U.S. residential connections, the fitting is a standard garden-hose-thread connection sold as GHT, GHM, GHF, NH, or NHR. Match the fitting’s thread type and whether it is male or female to the part already installed.

What Does Garden Hose Thread Width Mean?

Garden hose thread width usually refers to the nominal ¾-inch threaded connection, not the outside measurement of the swivel nut or faucet handle. Check the fitting label for the complete thread designation and inspect whether the thread is inside or outside the fitting.