Caps and Plugs


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Caps and Plugs, Certified Quality

Made in USA

Made in USA

100% Made in USA, Factory Direct. We are the Manufacturer!

Recyclable Materials

Recyclable Materials

All products are made from recyclable materials

Sustainable Options

Sustainable Options

All caps and plugs have the option to be made with BioMaxTM, a plant-based recyclable (HDPE) high-density polyethylene

Free Shipping

Free Shipping

More ways to save! Caps and Plugs USA offers Free Ground Shipping on all orders within the US48

Plastic Caps / Plastic Plugs

Straight Wall Flanged

Straight Wall Flanged

Straight Wall Flangeless

Straight Wall Flangeless

Straight Wall Pull Tab

Straight Wall Pull Tab

Tapered Wall Flanged

Tapered Wall Flanged

Tapered Wall Pull Tab

Tapered Wall Pull Tab

Grease Caps

Grease Caps

Express Orders

Place orders 24 hours a day, 7 days a week on our website.

Free Local Pickup

Pick up your order for free at our Tustin, California location. M-F 10am-2pm

30-Day Returns

We offer credit on authorized returns within 30 days of shipment.

Frequently Asked Questions

What is a cap and plug?

A plug is a male fitting which seals the end run of a pipe when fitted into a female fitting. An end cap is a female threaded fitting and is threaded over the end of a piece of pipe to seal it off.

Should I use a plug or a cap?

In general, you would choose a cap to protect external features like threads and surfaces from environmental damage. Opt for a plug to safeguard internal passages and holes against contamination and debris.

What are pipe caps?

Pipe caps are protective fittings used to cover the end of pipes to secure them from damage and contamination. They can be used for sealing the pipe during transportation and storage, or to close off plumbing lines temporarily or permanently.

What is a pipe cap in plumbing?

A pipe cap is a type of pipe fittings, also known as heads, plugs, bulkheads, installed on the external thread of the pipe end to cover the pipes. Used to close the pipeline, the function is the same as the pipe plug.

What are masking caps?

Masking caps are protective covers used to shield specific areas of components from paint, coatings, or other finishing processes.

How are plastic caps made?

Most plastic bottle caps are manufactured through a process known as injection moulding.