New Harmony

Screw-On Rubber Endpin Ball (10mm-1.5 threads)

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  • Endpin threaded ball by New Harmony side view
  • Endpin threaded ball by New Harmony from above
  • Endpin threaded ball by New Harmony on an endpin
  • Endpin thread comparison photo next to coin
  • Example of a thread ID board at the hardware store
Our Low Price: $24.00

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If you have an endpin with a threaded tip, this is a replacement for your original rubber cap (that might have been lost, worn out, damaged, or otherwise rendered unusable or ineffective.)

This little sphere - about 1.5" in diameter - is the cure to dreaded "spouse comments about holes in carpet" as well as dirty looks when you spike your bass into somebody's wooden floor. It also will help avoid having your endpin skid across smooth surfaces. It's Similar to the Wolf Super Endpin Ball (we also sell that), but for screw-on double bass end pins. Extremely tough and long lasting. Made with high quality rubber. Unlike the standard screw-on rubber tip, the Ultra Sphere tip, due to its ball shape, allows for movement and leaning of the bass more comfortably.

While this endpin ball is robust, nothing is permanent, and, depending on use, it will eventually need to be replaced if significantly worn.

This will not fit ALL bass endpins. Will it fit yours?

This endpin ball has threads, and they must match the threads on your endpin exactly. If your endpin has different measurements than we've provided here, do not buy the endpin ball, it will not work with your endpin. Size matters!

To save you some time, this will not fit the stock (bare steel) Kay/Engelhardt endpin, which is 1/2" and does not have threads on it.

How to measure:

The threads that are on this endpin ball are specified as METRIC 10mm x 1.5 but it may also fit an SAE thread measuring 3/8" x 16. What that means is that the threads are on a 10mm post, with 1.5mm between the threads. The SAW measurement meanst that there is a 3/8" post, and there are 16 threads per inch.

It fits BEST on the metric size, but since the threads are plastic, it will also fit the SAE, but it gets "snug" once it's on most of the way. So if you overtighten it, it may damage some of the threads in the ball. But it won't damage your endpin.

This is a common size, often found on 10mm or 12mm endpins, and there are a couple ways to confirm that's what you have:

    1. (BEST) If you're replacing a lost cover, take the endpin out of the bass, and make a quick trip to the hardware or home improvement store (ACE, Home Depot, Lowe's, etc.) If you still have the old threaded rubber (it's just torn or worn out), you can take it with you, instead. Most of the stores have a "board" of sorts that allows you to test fit a screw or nut to find out what the thread size is. (Such a board is shown in the photos, above - it's the yellow board, and you can see that I've fitted a black collar for a previous endpin ball we carried onto the 3/8"x16 post.) Test-fit your endpin or cover into the board, and if it fits properly into the threaded hole marked as 10mm x 1.5 or "3/8"-16," you'll be CERTAIN that you have the right measurement.

    2. (PRETTY GOOD) Use a caliper to measure the diameter of the rod at the threads. If it's 3/8" (or really close) count threads along 1/2" length on the post (or a whole inch, if you're feeling saucy). If it's 8 threads for 1/2" or 16 threads for the inch -- it could be off by 1 in either direction, due to the orientation of the threads at any given moment -- then you can be fairly confident that you've got the right size.

    3. (NOT AS ACCURATE) Take a look at the photo above; the one where I've taken a closeup photo of the endpin threads next to a penny, for reference. Eyeball it as best you can. Since there are commonly only a few sizes, if you put a penny next to your endpin, you may be able to tell whether yours is similar by comparing. If you're not so good at spatial comparisons, though, this method has failure written all over it.

What if, after all that, I buy it and it doesn't fit?

Sorry, it's still yours to keep. We've provided you as much information as possible to ensure that it's the right fit before you buy. This is a small, low-cost item, and after deducting the costs of shipping, it will probably make returning this for refund or credit utterly pointless, for both of us. So please, measure before you order, so that you can be confident that it will be the right option for you. I guess what I'm saying, is, don't "screw" it up!


  • Ball Diameter: Approximately 1.5"
  • Threads in sleeve: SAE 3/8"-16 (3/8" post, 16 threads per inch)

Additional Tip

  • If you never "spike in" on the stage, and rarely (if ever) intend to remove the Endpin Ball (like most of us), I suggest getting a small tube of "Thread Lock" at the hardware/home improvement store. Get the "non-permanent" type -- the permanent type is basically superglue. Putting a drop of it on the threads before you put the ball on will hold it fast and prevent loss and vibration. If you later find that you must remove the ball, the non-permanent threadlock will allow you to use a bit of force to break the bond and unscrew it. (With the permanent kind, it's on there for good!)
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