Grease plugs, sometimes considered pipe plugs, are an externally threaded plug crafted from carbon steel. They feature a variety of head types including square, hex, and hex/slotted for easy installation and removal.
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.
What size thread is a grease ZERK?
1/4″
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.
Are all grease Zerks the same size?
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.
Why does grease gun get stuck on ZERK?
Grease guns get stuck on fittings due to clogged zerk fittings which don’t let the grease pass through and cause a pressure build up that prevents them from releasing. So to get it unstuck unscrews the hose or hardline from the gun which will release the pressure and allow it to come off.
What does Zerks mean?
zerk in American English (zɜrk ) noun. a small metal fitting through which grease can be inserted into a mechanical joint that requires periodic lubrication.
Are cars still lubed?
A vehicle’s frame is also known as its chassis. Few vehicles are still manufactured with chassis lubrication fittings, but if you drive an older vehicle there may be a host of grease fittings that need attention during your regularly scheduled oil change service. Today, most vehicles do not require lube service.
What are Zerks on a car?
Simply put, a zerk is a fitting that lets you inject grease lubricant into wear points on cars or trucks. This allows smooth, steady movement and better overall handling.
Are there metric Zerk fittings?
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.
Are there different size Zerks?
There is effectively just one size. There are some other weird ones out there, the common being button head I believe, but if it looks like a standard grease zerk it is going to be the standard size.
Are there metric grease Zerks?
What thread is a grease zerk?
The included angle of the thread for a 1/4″-28 taper thread grease zerk is 60º. Taper thread grease fittings include a dirt-excluding ball check. Taper thread grease fittings are also referred to as taper thread zerk fittings, taper thread grease zerks, or a taper thread zerk.
Is this a grease zerk?
Grease zerks are used to lubricate mechanical parts which require grease. A spring-loaded ball inside the grease zerk compresses when pressure is applied with a grease gun and allows grease to flow through the fitting into the application the grease zerk is installed. After pressure from the grease gun is released the spring-loaded ball check returns to the head of the grease zerk and stops dirt and other contaminants from entering the grease zerk as well as preventing grease from escaping
What size is a grease fitting?
For example, a 1/4-28 inch grease fitting has a nominal diameter of 1/4 inch and has 28 TPI. For metric grease fittings, thread size is the nominal diameter and thread pitch, which is the distance between each thread measured in millimeters.
What is a grease fitting?
A grease fitting, grease nipple, Zerk fitting, or Alemite fitting is a metal fitting used in mechanical systems to feed lubricants, usually lubricating grease, into a bearing under moderate to high pressure using a grease gun.
