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Guide To End Caps

Welcome to the Vital Parts Guide To End Caps! Your number one source for information regarding measurements, uses and sizing, all in one place. This guide has been put together to provide insight into the solutions available, when to use them, and how to go about measuring them, to ensure you have the knowledge when it comes to finding the right cap for the job. 

End Caps, Covers or Tube Ends as they can be known are one of the largest product selections that we offer, featuring over 20 different styles suited perfectly to a number of industries and consumer uses.

OverviewEnd Caps in use
  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, preventing 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 out there.
  • To finish off an object
When finishing off a generic object End Caps can be a go-to solution, providing a versatile and stylish finish as per requirements. Often used in conjunction with tubes or poles these caps simultaneously provide internal protection benefits by preventing ingress.
  • To mask off
Another popular employment for End Caps is their use for masking purposes. Coming 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 and 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.

Ease of use
Most Caps are designed for a push-fit installation onto your object/application (eg; A Thread), with some requiring screwing in to fit. Being an easy fit 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, with hugely competitive prices at the 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, sharing many similarities with Tube Inserts in the sense that 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!

Firstly, you want to find the outer measurement of your application. This is done by working out the distance between both of the outer lips of your object. (See image below)

Secondly, once you have the outer measurement correct you want to match this up with the internal figure (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. 

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.

Please refer to the images below for a visual representation. 

Guide To End Caps measurement support imageGuide To End Caps measurement support image 2



What’s Available For End Caps?

Our selection covers a huge number of uses from specialist, to basic and every day. Coming mainly in either Rubber or Plastic designs there are many different properties available depending on your use, which can be 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 and 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, coming in a number of high temperature and durable variations to suit.

*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.