PolyGrip Blind Rivet Nuts. The GESIPA blind rivet nuts with a large clamping range. The PolyGrip blind rivet nuts from GESIPA are a consistent advancement based on years of experience with our PolyGrip multi-range blind rivets. With the advantages of large hole tolerance and the ability to cover various clamping ranges with just one fastener, the PolyGrip blind rivet nut has become a top choice connector in many industrial applications and also in crafts. Consolidating several dimensions saves handling and storage costs and significantly reduces the risk of confusion in the workplace, thereby preventing downstream quality issues. Large clamping range. Ideally, a PolyGrip blind rivet nut can replace up to five different sizes of DIN-standard blind rivet nuts due to its large clamping range. This offers the following benefits for you: limitation of types, reduction of variety in stock, and decreased risk of confusion, resulting in fewer processing errors.