The document is valid for spin-on filters, used in hydraulic applications, for filtration of the fluids. It fixes the required dimensions to ensure the interchangeability.
DIN 24550-8:1999 history
1999DIN 24550-8:1999-04 Fluid power - Hydraulic filters - Part 8: Spin-on filters; filter and connection dimensions
1999DIN 24550-8:1999 Fluid power - Hydraulic filters - Part 8: Spin-on filters; filter and connection dimensions