Kevin Rhodes

We use these small seals often enough that I ordered several of the #12 size to keep in the service drawer. They are inexpensive, individually useful, and the product description was specific enough to order with confidence. This one worked as a direct replacement on a Boss fitting with no surprises. There is not much else to say about an O-ring, but for routine hydraulic maintenance, having the correct Buna replacement at this price is a practical buy.

February 24, 2026

Daniel Mercer

I bought the #12 SAE Boss Buna O-ring as a replacement for a worn seal on one of our hydraulic fittings. It matched the size I needed and seated properly without any fuss. For a low-cost maintenance item, it is exactly what I expect: simple, clean, and ready to use. Buna is what I was looking for, and at this price it makes sense to keep a few extras on hand. No complaints so far.

March 30, 2026

Lisa Harmon

This is a straightforward replacement O-ring, but that is really the point. The listing clearly states it is for SAE/O-Ring Boss fittings, and that is exactly how I used it. Material looked right and the fit was consistent. At a quarter each, it is an easy item to add to a parts order. The only reason I left four stars instead of five is that these tiny parts are easy to mix up, so I always double-check sizing before installing.

April 20, 2026