48S812 - Walter M8x20 Grade 8.8 Zinc Plated Replacement Screw

Technical Overview of the Walter 48S812 M8x20-8.8 A2F Screw

The Walter 48S812 is a precision-engineered metric fastener designed specifically for the maintenance and repair of Walter Surface Technologies equipment. As a genuine OEM component, this screw ensures that the structural integrity and operational safety of your industrial machinery are maintained to factory standards. The designation "M8X20" indicates a metric thread diameter of 8 millimeters combined with a shaft length of 20 millimeters, a common specification in heavy-duty power tools and surface finishing equipment.

Material composition is a critical aspect of this component. The "8.8" grade marking signifies a high-tensile steel construction. In engineering terms, this denotes a nominal tensile strength of 800 MPa and a yield strength of 640 MPa. This makes the 48S812 significantly stronger than standard commercial fasteners (often grade 4.6 or 5.8), allowing it to withstand the high vibration and torque loads often associated with grinding, cutting, and finishing operations. Using a lower-grade substitute in these applications could lead to shear failure or thread stripping, compromising the equipment.

The "A2F" suffix refers to the surface treatment applied to the fastener. This code typically corresponds to an electro-galvanized zinc coating with a specific thickness and passivation layer. This treatment provides essential corrosion resistance, protecting the underlying steel from oxidation caused by exposure to humidity, coolants, and industrial contaminants. For maintenance professionals and MRO specialists, utilizing the correct specification of fastener is paramount. The 48S812 ensures that thread engagement, torque retention, and environmental resistance meet the rigorous demands of industrial environments.

Whether used in the assembly of housing components, motor mounts, or accessory guards, this screw is manufactured to tight tolerances. It serves as a direct replacement for worn, damaged, or lost hardware on compatible Walter devices, ensuring seamless installation without the need for modification or thread locking compounds unless specified by the service manual.