Description
An O-ring is a simple but brilliant part. It’s a loop of rubber that sits in a groove. When two parts are tightened together, the O-ring gets squeezed. This squeeze fills the gap perfectly, creating a tight seal that blocks air and fluid
First, its size. At 87 x 3 mm, it’s a larger seal designed for bigger connections on industrial pumps. The “87 mm” is the inside diameter. The “3 mm” is the thickness of the ring itself. Getting the right size is critical for a proper seal.
Second, its material. It’s made from FKM, which is also known as Viton. Think of FKM as a super-rugged type of rubber. It laughs at things that ruin ordinary seals—like oil, heat, and many chemicals.
Using this FKM O-ring means your pump connections stay secure. You get reliable performance and avoid downtime from leaks.

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