48S173 - Walter M5x20 Socket Head Cap Screw DIN 912

Technical Overview of the Walter 48S173 M5x20 DIN 912 Screw

The Walter 48S173 is a precision-engineered replacement fastener designed to meet the rigorous demands of industrial maintenance and equipment repair. Identified as a DIN 912 screw, this component features a cylindrical head with an internal hexagonal drive, commonly referred to as a socket head cap screw. This design is critical for applications where space is limited, as it allows for tightening with an Allen key or hex driver without requiring side clearance for a wrench. The internal drive also permits higher torque transmission compared to slotted or Phillips heads, ensuring a secure assembly that resists loosening under vibration.

Dimensionally, this screw utilizes a standard Metric M5 thread profile. The "M5" designation indicates a nominal outer diameter of 5 millimeters. Unless otherwise specified, M5 screws typically follow a coarse thread pitch of 0.8mm, which is the standard for general engineering applications. The length of the screw is 20mm, measured from the underside of the head to the tip of the fastener. This measurement is crucial for ensuring proper thread engagement depth without bottoming out in blind holes or protruding excessively in through-holes. Adherence to the DIN 912 standard ensures that the head height, head diameter, and socket size are consistent with international engineering norms, guaranteeing compatibility with standard metric tooling.

As a genuine Walter Surface Technologies spare part, the 48S173 is manufactured to strict quality control standards. In the context of Walter's high-performance power tools and finishing equipment, using OEM fasteners is essential. Generic hardware may suffer from inconsistent thread tolerances or inferior metallurgy, leading to cross-threading, seizing, or premature failure under load. This screw is likely used to secure housings, guards, or internal components within Walter's range of magnetic drills, grinders, or surface finishing systems. Maintaining the structural integrity of these tools is paramount for operator safety and tool longevity.

When installing the 48S173, technicians should ensure the mating threads are clean and free of debris. The use of a calibrated torque wrench is recommended to achieve the appropriate clamping force without exceeding the yield strength of the screw or stripping the internal threads of the host component. For applications subject to significant vibration, the application of a thread-locking compound may be advisable, subject to the specific maintenance guidelines of the equipment being repaired.