Standards
[CURRENT]
NF E03-612
NF E03-612
Asymmetrical trapezoidal screw thread, artillery type, 3 o - 45 o - Checking by limit gauges
Title (German)
Asymmetrische Trapezgewinde, Artillerie-Typ, 3 o - 45 o - Untersuchung durch Grenzlehren.