Standard Broom Handle Thread Size

I have a few paint tools such as telescoping poles that all use the same standard threads.

Standard broom handle thread size.

Our standard threaded handles are made of lacquered hardwood for consistent dependability and fits most brooms and brushes that utilize an acme type thread. However that doesn t seem to be the case. I am looking for information on the threads for a screw in wood handle pitch thread depth etc. There are several variations in use.

But it is not the right pitch for standard broom handles. One size does not fit. I had the same problem trying to find the most common thread for the pole extensions for paint rollers. For example you cannot use a handle with acme threads on a floor brush that has european threads.

Does anyone out there have specs for threads on standard broom handles. Acme standard and european thread types. If you check various brooms you will find several variations on the thread style. Apparently there are two standards common in the usa both based on a 3 4 dowel 0 75 inch or 19mm.

Most popular is about 3 4 outer thread dia x 5 tpi. I m trying to 3d print a widget and need to create a hole with a thread type for a standard paint stick. European brush manufacturers make handles with european threads. I tried several broom handles and handle extensions they don t thread in ore than one turn.

Another flavor is about 1 080 outer thread dia x 4 tpi. Besides painting i ve seen the same or similar standards used for brooms lightbulb grips pool tools and gutter cleaning poles. American broom and brush manufacturers make acme threaded handles and brushes. I was able to find a thread gauge and found that a standard broom handle thread is 3 4 5.

This is a nice tap well made and cuts nice threads. Size of thread on broom handles. In the united states most threaded handles for brooms paint rollers extension poles for window washing brushes and squeegees and so forth have threads inch in diameter 5 threads per inch acme form. I have two different thread sizes both appearing to have something close to acme thread profiles but not standard tpi.

Every paint and broom stick i own will not work with the acme thread type i ve tried 2 3 and 4g but no luck. I thought that most us paint stick threads were acme 4 or 5 theads per inch.