Ebook Description :

Nominal pipe size 1238 acme threads provide fast make up and break out regardless of position or space restrictions no special tools are required simple identification weco standard service wing unions are union threads figure 400 4000 psi 276 bar cold working pressure. Acme general purpose 2g thread series limiting dimensions tolerances the dimensions listed below can be used to determine the diameter along with the thread pitch. External general purpose acme thread size table chart there are three classes of general purpose acme threads 2g 3g and 4g each class provides some clearance on all standard size diameters for free movement and are used in assemblies with the internal thread rigidly fixed and movement of the external thread in a direction perpendicular to its axis limited by its bearing or bearings. The threads are full acme on all sizes limy excellent article on the different hammer unions i worked for a company back in 1989 that made hammer unions and that size combination was one brought to our attention many times ive completly frogotten about that i dont deal with hammer unions since then and im glad ken