100729 Febi Close-tolerance bolt

Febi's Close-tolerance bolt provides a reliable fastening solution for engine components. Primarily used in the heads and valve train of engines, this product is designed to withstand demanding conditions. Its phosphated surface enhances durability and resistance to corrosion. Valve rods and rockers are critical components of an engine’s valve train, translating rotational motion of the camshaft into linear motion to open and close intake and exhaust valves. Rocker arms pivot on a fulcrum, amplifying camshaft lift and transferring it to the valve stem via the valve rod (or pushrod in OHV engines). These components are located within the cylinder head and engine block, operating in a high-temperature, high-stress environment. Manufacturing typically utilizes hardened steel alloys for durability and resistance to wear. Precise machining and heat treatment are essential for maintaining valve timing and engine performance. Variations include roller rockers to reduce friction and different length pushrods to accommodate aftermarket camshafts.