M6x125

M6x125 denotes a metric fastener with a nominal diameter of 6 millimeters and a length of 125 millimeters. The designation is commonly used for bolts, screws, or studs, and the exact head type and thread length can vary by manufacturer. The “M6” part indicates ISO metric thread size, while the “125” specifies the overall length of the fastener.

Threads on M6 fasteners are typically the coarse standard, which has a pitch of 1.0 millimeter for M6. Some variants use a fine pitch such as M6x0.75, but M6x125 most commonly refers to a 6 mm diameter with 1.0 mm pitch when described in general catalogs. Length is measured from the underside of the head to the tip of the fastener for bolts, or along the threaded portion for studs or screws, depending on the design.

Materials and finishes vary by application. Common options include carbon steel with zinc plating or galvanization for corrosion resistance, and stainless steel variants (such as A2 or A4) for more demanding environments. Strength grades, when specified, may include 8.8 or higher for bolts, indicating higher tensile strength. The choice of material and finish affects properties such as torque requirements, load capacity, and corrosion resistance.

Applications and standards. M6x125 fasteners are widely used in machinery, automotive assemblies, furniture, and electronics enclosures where a long 125 mm fastener is required. They follow ISO metric thread standards and related DIN specifications, with exact thread engagement and head geometry determined by the particular product line and intended application. When selecting an M6x125 part, it is important to confirm head type, thread length, material grade, and finish to ensure proper fit and performance.