ISO 7774:1984

Road vehicles — Compression ignition engines — Single fuel filters with horizontal flange and centre bolt fixing — Mounting and connecting dimensions

Establishes the mounting and connecting dimensions for single fuel filters type 1 (sizes A1, B1 and C1), type 2 (sizes A1, B1 and C1), type 3 (sizes A1 and B1). Dimensions and requirements not specified are left to the discretion of the manufacturer. An example of the designation of a type 2 filter of size B1: Filter ISO 7774 – 2B1.