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what size are zerk fittings

by Prof. Donavon Hegmann II Published 11 months ago Updated 1 month ago
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Most of the zerks for balljoints, ujoints and tierod ends are 1/8", 1/4" are fairly large for most applications. That's generally 1/8 pipe thread. The 1/4"-28 is machine screw size, that 1/8 NPT

National pipe thread

National Pipe Thread Taper (NPT) is a U.S. standard for tapered threads used on threaded pipes and fittings. In contrast to straight threads that are found on a bolt, a taper thread will pull tight and therefore make a fluid-tight seal. In America, William Sellers set the standard for nut…

is actually bigger..

1/4"‑28

Full Answer

Are there different sizes of Grease Zerks?

What size is a standard grease fitting? 1/4″‑28. Do grease Zerks come in different sizes? There are Metric grease zerks. Seems they come in sizes like M6, M8 and M10. More good news. Why is it called a Zerk fitting? The Zerk design, named after Oscar Zerk, used a fitting much smaller than the Alemite pin-type and did not lock the hose coupler or hand gun and fitting together.

How to attach grease gun to Zerk fitting?

  • Make sure that the tip of your grease gun is clean and free from debris or other obstructions.
  • Align the tip of the grease gun with the opening of the zerk fitting, ensuring that it is straight and perpendicular to the surface.
  • Push the grease gun onto the zerk fitting until it is fully seated and secure.

More items...

What are different types of pipe fittings?

Types of Pipe Fittings. Adaptor; Barb; Coupling; Cross; Double Tapped Bushing; Elbow; Mechanical Sleeve; Nipple; Plug and Cap; Reducer; Tee; Union; Valve; Wye . Adaptor. Adaptors connect pipes that are not the same type. Because an adaptor can be male or female on one end, it can turn a pipe male or female.

What are the types of fitting?

What are the different types of Fits in Engineering?

  • Types of Fits In Engineering. There are so many types of fits that are implemented. ...
  • Clearance Fit. This means there is a gap between the two mating parts. ...
  • Interference Fit. There is no gap between the faces and there will be an intersecting of material will occur. ...
  • Transition Fit. ...
  • Conclusion. ...

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How do I know my Zerk fitting size?

0:102:05The trick to tell grease zerks apart - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou can find one at loc and lube comm. But now let me show you a quick trick to tell the differenceMoreYou can find one at loc and lube comm. But now let me show you a quick trick to tell the difference between the quarter twenty eighth and the eighth inch pipe thread using just a tape measure. Okay.

Are Zerk fittings standard?

Zerk Fitting Standards. Our zerk fittings meet or exceed all commercial standards, and conform with the following: SAE Specification J-5343. Military Specification F-3541.

What size socket is a grease ZERK?

SAE Socket SIze: -7/16".

Are Zerk fittings NPT?

Alemite is the original manufacturer of Zerk fitting and continues to be the “gold standard” for quality.

Why are they called Zerk fittings?

The Zerk design, named after Oscar Zerk, used a fitting much smaller than the Alemite pin-type and did not lock the hose coupler or hand gun and fitting together. Instead, the seal between them was maintained by the pressure of a pushing action when the operator applied the coupler to the fitting.

Are there different size grease nipples?

There is no one-size-fits-all grease fitting. They come in various types, sizes and thread identifications.

What size is a standard grease fitting?

1/4"‑28The most common standard grease zerk size is 1/4"‑28 SAE‑LT and is often used in automotive applications. They can also be found in agricultural environments as well as other various standard duty applications. For heavy-duty applications, larger 1/8"‑27 PTF grease zerk fitting sizes can be found.

Are grease fittings metric?

Metric Grease Fittings are available in both regular and stainless steel. Metric Grease Fittings are also referred to as Metric Zerk Fittings, Metric Lubrication Fittings, Metric Hydraulic Fittings, and Metric Zerks.

What size wrench fits a grease fitting?

13/16” Square 1 1/2” Hex.

What is the difference between PTF and NPT?

NPTF minor diameters are slightly smaller than NPT, making their thread roots truncated or shallower than NPT threads. While NPTF has the same taper as NPT threads, they have truncated or shortened thread roots that interfere with the crests of the mating thread.

What is a 1/4 NPT thread?

As a general “rule of thumb” an NPT thread is approximately 1/4" (0.25”) larger than its “name.” For a 1/4" NPT fitting the “nominal” OD is 0.533”. NPT fittings are slightly tapered so the “nominal” diameter is the diameter in the middle of the threaded portion, as measured by the top (crest) of the threads.

What are the different types of grease fittings?

There are three major thread types for grease fittings: metric, taper or parallel, and unified. M5, M6, M7, M8, and M10 are common metric threads. British standard pipe (BSP), pipe thread fine (PTF), and national pipe thread fine (NPTF) fittings use tapered or parallel threads.

Are all Zerk fittings the same?

Zerk fittings come in a variety of types, such as Drive In, Rivet, and Thread Forming.

What size is a standard grease fitting?

Grease fittings come in many different styles. There are two grease fittings that are very common. These are the 1/4″-28 thread and the 1/8″ NPT thread. However, there are other less common grease fitting threads in use.

Are there different size grease gun couplers?

Standard, Giant, and Metric Button Head Couplers fit to button head grease fittings with selection based on size of fitting. Grease Gun Adapter Kits are a must-have for any lubrication specialist.

Are there different types of grease fittings?

Three styles are available for the body, including several NPT thread sizes for tapped holes, a self-threading style, and a barbed, or drive, style for insertion into untapped holes. These fittings can also be found with British and metric threads.

What is a zerk grease fitting?

A zerk grease fitting (also known as a grease fitting or grease nipple) patented by Oscar Zerk in 1929 is used in mechanical systems to feed lubric...

Where can I buy a zerk grease fitting?

G.L. Huyett offers its own complete private line of Heritage Industrial® grease fittings and accessories at the lowest distributor price! We are al...

How do grease fittings work?

Grease zerk fittings work by acting as a one‑way check valve that allows grease to pass through one way, but not the other. Inside the fitting is a...

What are the most common standard grease fitting sizes?

The most common standard grease zerk size is 1/4“‑28 SAE‑LT and is often used in automotive applications. They can also be found in agricultural en...

How much grease should I put on a fitting?

The amount of grease put in a fitting depends on the size of the part to which it is attached. As a general rule of thumb, apply grease until you b...

How do you know when a grease fitting is full?

There is no simple answer to the question of when to stop adding grease. It depends on the nature of the mechanism and the size of the space into w...

Can you over-grease a fitting?

Yes. Only apply grease until you begin to feel resistance while pumping. Do not apply grease until completely full or seeping out of the fitting or...

How to grease a zerk fitting

While grease fittings themselves do not require grease, the part they are attached to does. To grease the part, attach a grease gun to the end of t...

What are the different types of grease guns?

There are many different types and designs of grease guns, and we offer lever, pistol, cordless, and pneumatic grease guns. We have a gun for pract...

How to attach a grease gun to a zerk fitting

First, ensure both the zerk fitting and the grease gun coupler are clean and free of debris and other contaminants. This will help ensure a secure...

What is a zerk fitting?

A zerk is available in different threads, lengths, angles, materials, and finishes. A Zerk is commonly referred to as a grease fitting or zerk fitting.

What is a zerk?

Zerk. A zerk is used to lubricate mechanical parts which require grease. A spring-loaded ball inside the zerk compresses when pressure is applied with a grease gun and allows grease to flow through the fitting into the application the zerk is installed.

What is a grease zerk?

Intended for light oils and hydraulic fluids, leak‑proof grease zerks are often used in the textile and food processing industries where prevent lubricant leakage is critical. Available in zinc clear, zinc yellow, or traditional steel finish. Designed to provide leak‑proof seals up to 10,000 psi.

What is the most common standard size grease fitting?

The most common standard grease fitting size is 1/4"‑28 SAE‑LT and is often used in automotive applications. They can also be found in agricultural environments as well as other various standard duty applications. For heavy duty applications, larger 1/8"‑27 PTF zerk fittings can be found.

How do grease fittings work?

Grease zerk fittings work by acting as a one‑way check valve that allows grease to pass through one way, but not the other. Inside the fitting is a ball check suspended by a spring. As grease is pushed into the fitting, pressure is created against the ball check that compresses the spring allowing grease to pass completely through the fitting. When grease flow stops, the spring pushes the ball check back to its original position, closing the fitting and preventing grease to escape.

How much grease should I put on a fitting?

The amount of grease put in a fitting depends on the size of the part to which it is attached. As a general rule of thumb, apply grease until you begin to feel resistance while pumping. Do not apply grease until it seeps out of bearing seals or other components.

What is a button head grease fitting?

Button head grease fittings are a heavier duty fitting identified by their flat, low profile appearance. They are able to handle large grease volume due to their high flow rate and sturdy construction. They are commonly used on conveyors, mining equipment, agricultural equipment, and other rugged applications.

What is grease fitting?

Grease fittings, also known as zerk fittings or grease nipples, serve as lubrication points on bearing housings or other mechanical components. Their design provides a secure connection to a grease gun coupler for delivering precise amounts of grease into bearings and other moving systems.

Where to thread non-flared extension?

Thread the non-flared end of the extension into the grease fitting hole of the mechanical part you are servicing.

What is a Zerk fitting?

Named for Oscar Zerk, an Austrian inventor and entrepreneur, a Zerk fitting is another term for a grease fitting, which is used to lubricate points on bearing housings or other mechanical equipment.

Is there a one size fits all grease fitting?

There is no one-size-fits-all grease fitting. They come in various types, sizes and thread identifications. Your owner’s manual may mention the correct size for your situation, and the Haynes Repair and Maintenance manual can also point you in the right direction.

Can you order grease fittings?

Although grease fittings aren’t expensive, ordering the wrong size would be a waste of time. You can order a grease fitting assortment, which routinely includes eight sizes, but if you only need one, then why spend the extra money? You can always contact a NAPA associate to help you find the right fittings as well.

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