DIN 49020
(Light gauge welded steel conduit (Thereaded,with one couoler per lenght
Standard finishes : Stove enameled (black) providing medium protection both inside & outside
Hot dip galvanized providing heavy protection both inside & outside
Applicable Tolerances : Outside diameter : +0.1 mm, Wall thickness : +- 0.15 mm, Lenght : 3ml.(without coupling), Thread per pitch : 18 (Pg 11 to Pg 16).16(Pg 21 & Pg 42), according to DIN 40430