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Guide To End Caps

Welcome to the Vital Parts Guide To End Caps!

Click here to visit our Knowledge Hub!

This is your number one source for information regarding measurements, uses and sizing. This guide has been put together to provide insight into the solutions available, when to use them, and how to go about measuring them. This is to ensure you have the knowledge when it comes to finding the right cap for the job.

End Caps, Covers, and Tube Ends are one of the largest product selections that we offer. End Caps in useThey feature over 20 different styles suited perfectly to a number of industries and consumer uses.


  1. When to use End Caps
  2. Why use them
  3. How to measure
  4. What's available

When To Use End Caps:

To cover or protect an application:

A common use for End Caps is to cover or protect an object during transportation/storage. This is to prevent unnecessary damage from ingress, weathering, and other factors. Coming in a number of styles and sizes, you can rest assured that there is a suitable cap for every application.

To finish off an object:

When finishing off a generic object, End Caps can be a go-to solution. They provide a versatile and stylish finish as per requirements. Often used in conjunction with tubes or poles, these caps also provide internal protection benefits by preventing ingress.

To mask off:

Another popular employment for End Caps is their use for masking purposes. These products come in a range of high temperature materials such as Silicone & EPDM. These type of caps are often used during the powder coating, shot blasting, and anodizing processes to prevent unnecessary coverage. They also work to protect the object in question.

Why Use End Caps?

There are a number of reasons why you may choose to use End Caps over some of the other solutions that we offer here. From the sheer amount of sizes available, to the type of finish or protection that is provided, we offer many options.

Ease of use:
Most Caps are designed for a push-fit installation onto anobject/application. Some require screwing in to fit. Being an easy fit product prevents the need for costly fixings or adhesives to guarantee a long-term option.

Cost efficiency:
Being a mass produced option, these are often used indispensably as a temporary covering or protection solution. These production methods help to keep prices low at smaller quantities. We also offer hugely competitive prices at larger quantities.

Variety of sizes:
End Caps are often kept in a huge number of standard sizes and styles for each individual use. The majority of styles that we offer tend to come in a Plastic or Rubber, depending on your requirements.

How To Measure End Caps:

Caps are a relatively simple product to measure. They share many similarities with Tube Inserts. The most important measurements to consider are the Outside Diameter and Internal Diameter. Here's a quick run-down of how you can get those measurements, for matching up on our site.

Outside Diameter (OD)
Firstly, you want to find the Outer Diameter of your application. This is done by working out the distance between both of the outer edges of your object.

Outside Diameter inserts guide image

Internal Diameter (ID)
Secondly, once you have the Outer Diameter correct, you want to match this up with the Internal Diameter (which is often the measurement used on our cap products). Matching up your Outside with the Internal measurement will provide a tight and secure fitting.

Internal diameter inserts support image

Due to the materials used, you may find that certain products have the ability to stretch across a range of diameters, preventing the need for an exact measurement.

What’s Available For End Caps?

Our selection covers a huge number of uses, from specialist to basic and every day. These products come mainly in either Rubber or Plastic designs. There are many different properties available depending on your use, which can be easily matched up to requirements.

Below, we have split each product range into two different categories. This should help to outline our selection and ease navigation.

End Caps manufactured from Plastic derivatives are most commonly used for finishing, protecting, and covering uses. They are available in a number of bespoke and general styles to suit your application.


Rubber End Caps are a versatile form of cap that are regularly used for masking, protecting, and sealing uses. They come in a number of high temperature and durable variations to suit.

There are more styles available on site for both listed materials

For our range of Plastic Caps, Rubber End Caps & Tube End Caps please click here.
vital parts blue bannerFor any custom enquiries, problems or questions related to these type of caps then please feel free to contact us or give us a call on 01233 713581