270197 - Miller M4 x 55mm Socket Head Cap Screw (Pack of 2)

Technical Specifications of the Miller 270197 Screw

The Miller 270197 is a high-specification metric fastener designed for critical assembly points within industrial welding equipment. This hardware component is a Socket Head Cap Screw (SHCS) featuring an M4 diameter with a standard coarse pitch of 0.7mm. The total length of the screw, measured from under the head to the end of the threads, is 55mm. Manufactured from Class 12.9 alloy steel, this fastener offers the highest tensile strength available in standard metric socket screws, typically rated at a minimum tensile strength of 1220 MPa (177,000 psi). This high strength-to-weight ratio makes it ideal for securing heavy internal components or structural elements of welding power sources where space is limited but clamping force cannot be compromised.

The drive mechanism is a hexagonal socket, requiring a corresponding metric hex key (Allen wrench) for installation. This internal drive allows for higher torque application compared to slotted or Phillips heads and enables installation in tight recesses where external wrench clearance is unavailable. The cylindrical head profile provides a clean, flush finish when used with counterbored holes. As a genuine Miller Electric OEM part, the 270197 ensures strict adherence to dimensional tolerances, preventing issues such as thread galling or cross-threading that can occur with generic hardware. The Class 12.9 steel is typically finished with a black oxide coating, providing mild corrosion resistance and reduced light reflection. This pack contains two (2) identical screws, facilitating complete repairs of mounting points that often utilize paired fasteners.