DIN EN 22857:1990 Ground thread taps for ISO metric threads of tolerances 4H to 8H and 4G to 6G coarse and fine pitches; manufacturing tolerances on the threaded portion (ISO 2857:1973 incl. AMD 1:1984 and AMD 2:1986); german version EN 22857:1989
The standard specifies the manufacturing tolerances on the threaded portion of taps for producing the ISO metric threads of tolerances classes 4H to 8H and 4G to 6G, according to ISO 965-1 to 965-3.#,,#
DIN EN 22857:1990 history
1990DIN EN 22857:1990-07 Ground thread taps for ISO metric threads of tolerances 4H to 8H and 4G to 6G coarse and fine pitches; manufacturing tolerances on the threaded portion (ISO 2857:1973 incl. AMD 1:1984 and AMD 2:1986); german version EN 22857:1989
1990DIN EN 22857:1990 Ground thread taps for ISO metric threads of tolerances 4H to 8H and 4G to 6G coarse and fine pitches; manufacturing tolerances on the threaded portion (ISO 2857:1973 incl. AMD 1:1984 and AMD 2:1986); german version EN 22857:1989