Most recent
DIN 8140-2:2005
Wire thread inserts for ISO metric screw threads - Part 2: Helical coil threads for inserts, thread tolerances
The standard contains limits of sizes and tolerances for helical coil threads for inserts for internal screw threads of nominal diameters from 2 mm to 52 mm (coarse and fine threads) having a basic profile according to DIN ISO 68-1.
Deutsches Institut für Normung [din]