48S222 - Walter Replacement Self-Tapping Screw 4.2mm x 12mm

Precision Fastening with the Walter 48S222

The Walter 48S222 Tapping Screw St 4.2X12 is a specialized replacement component designed to meet the rigorous standards of Walter Surface Technologies equipment. In the realm of industrial maintenance and repair operations (MRO), using genuine Original Equipment Manufacturer (OEM) parts is critical for maintaining the performance and safety certifications of power tools. This specific fastener features a 4.2 mm thread diameter and a 12 mm length, designated by the 'St' marking which typically denotes a steel construction suitable for high-stress applications.

Engineered for precision, this self-tapping screw is commonly utilized in the assembly of tool housings, gearboxes, and protective covers found on Walter's extensive line of grinders, sanders, and finishing tools. The self-tapping design allows the screw to cut its own mating threads into the host material—often reinforced plastic or die-cast metal—creating a tight, vibration-resistant bond. This is particularly important for handheld power tools that generate significant oscillation during operation; a loose fastener can lead to housing misalignment, increased wear on internal components, or operator safety hazards.

The metallurgy of the 48S222 is selected to resist shearing and stripping, common failure modes in lower-quality generic fasteners. When servicing Walter equipment, technicians should verify the specific part number against the tool's exploded view diagram to ensure compatibility. The St 4.2X12 specification ensures that the screw engages fully without bottoming out or damaging the blind holes of the tool body. Whether you are performing a routine carbon brush change that requires opening the casing or replacing a damaged cord guard, this screw provides the factory-spec security needed to return the tool to service with confidence.

By choosing the genuine Walter 48S222, you are investing in the longevity of your equipment. Generic screws may have slight dimensional variances or inferior tensile strength, leading to stripped threads or snapped heads during installation. This OEM part guarantees the correct thread pitch and head geometry, ensuring that your Walter tools remain as robust and reliable as the day they were manufactured.