While many websites promise a free PDF of DIN 5464, most are either incomplete, low-resolution scans, or outdated versions (e.g., the 1986 version, which has been superseded). Using an obsolete standard can lead to design failures.

: While the standard normally assumes flank-centering, it also allows for additional diameter centering depending on the specific application needs. Torque Efficiency

(also known as parallel-sided splines) used in fixed and moving shaft-hub connections. Unlike the light or medium series (such as

For the professional engineer, the cost of the standard (usually under $200) is a trivial investment compared to the cost of a product recall caused by using an incorrect or outdated fastener specification. Purchase the official once, and use it as the definitive reference for your high-strength, fine-pitch flanged nut designs.

The standard typically covers diameters from up to M36 x 3 (fine pitch variations). Note that the pitch differs per diameter (e.g., M10 x 1.25, M12 x 1.5, M16 x 1.5).