Round Cap Generator

Updated to Version 2 (2026-08-26)

What's New:

- Added Internal / External Diameter selection. - Internal mode for caps that fit over an object. - External mode for caps that fit inside an object. - Added adjustable Clearance for better fit/tolerance. - Added clearer parameter descriptions. - Added visible error messages for invalid parameter combinations. Need a round cap in a specific size?

Press the Customize button to enter the parametric model maker.

Simply enter the dimensions and generate a printable model in seconds.

This customizable generator creates round push-fit end caps for a wide range of applications, from furniture and bed frame feet to aluminum tubes, PVC pipes, rainwater downpipes and ceiling box covers. D esigned to fit any round tubes or rods or structural tubes — whether for protection, aesthetics, or safety.

Features

- Fully customizable dimensions - Optional flange - Optional top, bottom and flange fillets - Suitable for virtually any round tube or opening - Ready to print Typical applications

- Furniture legs - Bed frame feet - Aluminum tubes - Stainless steel tubes - PVC pipes - Rainwater downpipes - Wooden dowels - Ceiling box covers - Protective end caps - General purpose tube plugs Need rectangular or hex caps or covers as well? Check out my Rectangular Cap Generator and Hex Cap Generator .