When replacing a beer faucet, shank, coupling nut, or beverage line fitting, one of the first specifications you need to confirm is the thread size.
Although many beer faucet components look similar, they may use different thread diameters, pitches, and sealing methods. Choosing the wrong thread can prevent the faucet from fitting properly and may result in leaks, damaged threads, or an unstable connection.
For most standard North American draft beer faucets, the faucet-to-shank connection uses a 1-1/8"-18 UNEF thread.
However, a complete beer dispensing system can include several other thread sizes. The correct answer depends on which part of the beer faucet assembly you are measuring.
The most common thread used to connect a standard North American beer faucet to a shank is:
1-1/8"-18 UNEF
This specification means:
1-1/8 inches is the approximate outside thread diameter.
18 means there are 18 threads per inch.
UNEF means Unified National Extra Fine.
The faucet is attached to the shank using a faucet coupling nut. A gasket is normally installed between the faucet and the shank to create a liquid-tight seal.
This connection is widely used on conventional draft beer faucets, including many rear-sealing and forward-sealing faucet designs.
Therefore, when someone asks, “What size is the shank thread on a beer faucet?” the most common answer is 1-1/8"-18 UNEF.
A beer dispensing assembly may include several different threaded connections.
| Connection | Common Thread Size | Main Function |
|---|---|---|
| Beer faucet to shank | 1-1/8"-18 UNEF | Connects the faucet body to the shank |
| Rear of beer shank | 7/8"-14 or 5/8" BSP beer thread | Connects the tailpiece, beer nut, or beer line |
| Beer tap handle | 3/8"-16 UNC | Connects the tap handle to the faucet lever |
| Tank-mounted beer tap | 3/8", 1/2", 3/4", or 1" NPT/BSP | Connects the tap directly to a tank or container |
These thread sizes are not interchangeable. Before ordering a replacement part, identify exactly which connection you need.
The rear section of a traditional beer shank normally uses a different thread from the faucet-facing side.
A common rear shank thread is:
7/8"-14
It may also be described as a 5/8" BSP beer thread in the beverage dispensing industry.
This threaded section is commonly used with:
Beer nuts
Tailpieces
Hose fittings
Flat sealing gaskets
Beverage line connectors
The beer nut tightens the tailpiece and gasket against the rear of the shank, creating a secure connection to the beer hose.
This is why you may find two different answers when searching for beer shank thread sizes:
1-1/8"-18 UNEF refers to the faucet-to-shank connection.
7/8"-14 or 5/8" BSP refers to the rear beer line connection.
Both answers may be correct, depending on the specific part being discussed.
The beer tap handle uses a much smaller thread than the beer faucet body.
The common North American beer tap handle thread size is:
3/8"-16 UNC
This thread connects a decorative or branded tap handle to the faucet lever.
Most standard tap handles designed for the North American market use this size. However, some imported, European, or proprietary faucets may use a different handle connection.
Always check the faucet manufacturer’s specifications before purchasing replacement handles.
These sizes usually refer to pipe connections on tank-mounted beer taps or ball valve faucets rather than the coupling thread on a conventional draft beer faucet.
Ball valve beer taps may be mounted directly onto:
Brewing tanks
Fermentation vessels
Beverage dispensers
Wooden barrels
Homebrew kettles
Food-processing containers
Stainless steel storage tanks
These taps may use NPT, BSPP, BSPT, or other pipe thread standards.
For this type of installation, Jarzoo supplies a Stainless Steel 304 Beer Tap with 3/8", 1/2", 3/4", and 1" Thread Options.
This stainless steel ball valve faucet is suitable for tanks, barrels, beverage containers, and custom dispensing systems. Different thread sizes and connection standards can be selected according to the installation requirements.
A pipe-threaded ball valve tap is different from a standard draft faucet that connects to a beer shank. Before purchasing, determine whether you need:
A conventional beer faucet that connects to a draft shank, or
A threaded beer tap that mounts directly to a tank or container.
NPT and BSP threads can have similar nominal sizes, but they are manufactured according to different standards.
They should not be assumed to be interchangeable.
NPT stands for National Pipe Taper.
It is commonly used in the United States and Canada. The thread diameter gradually becomes smaller toward the end of the fitting.
As the male and female threads are tightened together, the tapered surfaces create a mechanical seal. Suitable thread sealant or PTFE tape may also be required.
BSPT stands for British Standard Pipe Taper.
Like NPT, BSPT uses a tapered thread. However, the thread angle, profile, and pitch may be different from those of an NPT fitting.
BSPP stands for British Standard Pipe Parallel.
Unlike NPT and BSPT, BSPP threads are straight rather than tapered. The connection normally relies on an O-ring, washer, gasket, or sealing face.
Forcing an NPT fitting into a BSP connection can damage the threads and create an unreliable seal.
Always confirm:
Nominal thread size
Thread pitch
Thread angle
Straight or tapered design
Required sealing method
When the original product specification is unavailable, you can measure the thread manually.
First determine which part you are measuring:
Faucet body
Faucet coupling nut
Front of the beer shank
Rear of the beer shank
Tailpiece
Tap handle
Tank-mounted beer tap
This prevents confusion between the different thread sizes used in a beer dispensing system.
Use a caliper to measure the outside diameter of the male thread.
A standard faucet-to-shank connection should measure approximately 1-1/8 inches across the outside of the thread.
Keep in mind that nominal pipe sizes do not always match the actual outside diameter. For example, a 1/2" pipe thread will measure larger than 1/2 inch across the outside.
Use a thread pitch gauge or count the threads over a one-inch section.
Common examples include:
1-1/8"-18: 18 threads per inch
7/8"-14: 14 threads per inch
3/8"-16: 16 threads per inch
Measuring only the outside diameter is not enough. Threads with similar diameters may use different pitches.
A straight thread maintains nearly the same diameter along its full threaded length.
A tapered thread gradually becomes narrower toward the end.
Standard beer faucet coupling threads are normally straight and use a gasket. NPT and BSPT pipe threads are tapered.
The sealing method can also help identify the connection.
Common examples include:
Faucet-to-shank connection: coupling gasket
Beer nut and tailpiece: flat gasket
BSPP beer tap: O-ring or sealing washer
NPT or BSPT beer tap: tapered thread with suitable sealant
Do not assume that tightening the thread alone will prevent leakage. Many beer faucet connections require a gasket.
Thread size is only one factor when selecting a beer shank. The shank must also be long enough to pass through the mounting surface.
Beer shanks may be installed through:
Kegerator doors
Refrigerator walls
Wooden collar systems
Beer towers
Cold-room walls
Mobile dispensing cabinets
Bar counters
Measure the total thickness of the wall or panel before selecting the shank.
You should also allow enough space for:
Flange
Lock nut
Washer
Tailpiece
Beer nut
Beverage hose connection
A shank that is too short cannot be secured correctly. A shank that is excessively long may occupy too much space inside the refrigerator or dispensing cabinet.
The internal bore also matters. Common beer shank bore sizes include 3/16" and 1/4". The correct option depends on the beer line diameter, line length, pressure, and required flow rate.
Correct thread compatibility is important for reliable dispensing, sanitation, and equipment life.
An incompatible faucet or shank may cause:
Beer leakage
Pressure loss
Gas leakage
Damaged threads
Loose faucet installation
Improper gasket compression
Excessive beer foaming
Contamination around the connection
Difficulty removing the faucet for cleaning
If beer leaks between the faucet and shank, first inspect the coupling gasket and coupling nut. A worn gasket or loose nut is often the cause.
Do not use excessive force to tighten the faucet. Overtightening can damage the coupling nut, gasket, faucet body, or shank threads.
No.
Many North American commercial draft faucets use the standard 1-1/8"-18 UNEF connection, but not every faucet follows this specification.
Different connections may be found on:
European beer faucets
Flow-control faucets
Specialty beverage taps
Proprietary beer towers
Imported dispensing equipment
Tank-mounted ball valve faucets
Compatibility may also depend on:
Faucet socket depth
Sealing surface
Coupling gasket dimensions
Alignment teeth
Internal bore
Faucet body design
When combining components from different suppliers, verify both the thread size and the sealing structure.
The most common faucet-to-shank thread for North American draft beer faucets is 1-1/8"-18 UNEF.
Not always. A standard faucet coupling uses 1-1/8"-18 UNEF, while the rear of a beer shank may use 7/8"-14 beer thread. Tank-mounted taps may use NPT, BSPP, or BSPT pipe threads.
It is a common beverage industry connection used on beer shanks, beer nuts, keg couplers, and tailpieces. It may also be described as 7/8"-14 thread.
The common North American beer tap handle thread is 3/8"-16 UNC.
Not directly. A 1/2" NPT ball valve tap and a conventional draft beer faucet use different connection systems. A suitable adapter would be required.
The standard faucet-to-shank connection normally seals with a gasket and does not require PTFE tape.
Tapered pipe connections, such as NPT, may require a suitable thread sealant. Always follow the equipment manufacturer’s instructions.
Measure the outside diameter and thread pitch, and check whether the thread is tapered or parallel. Compare the measurements with an NPT or BSP thread chart before ordering a replacement.
For most standard North American draft beer faucets, the thread connecting the faucet to the shank is 1-1/8"-18 UNEF.
However, a beer dispensing system may also contain:
7/8"-14 or 5/8" BSP rear shank threads
3/8"-16 UNC tap handle threads
3/8", 1/2", 3/4", or 1" NPT/BSP tank tap threads
Before selecting a beer faucet or replacement fitting, confirm which part you are measuring. Check the outside diameter, thread pitch, thread standard, and sealing method.
For tanks, barrels, brewing equipment, and beverage containers, you can choose a stainless steel beer tap with multiple threaded connection sizes according to the installation requirements.
