The Haubold Fastening 503168 KL525 CNK is a bulk package containing 5,000 steel blind rivets, each 25 mm long. These industrial-grade fasteners are designed for permanent joints on various materials such as sheet metal, plastics, and composites. The designation KL525 CNK indicates a standard steel version with a galvanized surface for improved corrosion protection, suitable for indoor and outdoor use with moderate protection requirements. With a joining range of 25 mm, these rivets are suitable for material thicknesses of approximately 10 mm to 15 mm, making them versatile for assembly, repair, and manufacturing tasks in the automotive, construction, and manufacturing industries. The bulk package of 5,000 pieces offers cost efficiency for large projects or professional workshops with ongoing needs. Installation requires a standard rivet gun with a 5 mm mandrel diameter, and the blind rivet design allows for secure fastening from only one side of the workpiece, ideal for applications with limited access. The galvanization provides a durable surface that resists oxidation and extends the lifespan under humid or mildly corrosive conditions. These fasteners meet general industry standards for shear and tensile strength according to their material class. The product is delivered in organized packaging to maintain its condition during storage and handling. For critical applications, specific technical specifications regarding exact material composition, load limits, and conformity certifications should be verified against the manufacturer's documentation.