Din 3771 Standard Pdf. Standard by deutsches institut fur normung e.v. Din 3771 is produced by the duetsches institut für normung (german institute for standards).
All dimensions are given in millimetres. Dimensions as in iso /1. O ring usually using for static seal eg:
DIN EN 6079413 European Standards
Two quality levels are specified: Dimensions as in iso /1. Simplified reference easy to order: Dimensions as in iso 3601/1.