Pre-Plate pitch diameters, major diameters, and minor diameters of thread rings, thread plugs, and plug gauges.
The rules for determining Pre-Plate pitch diameters, major diameters, and minor diameters of thread rings, thread plugs, and plug gauges are as follows: To determine Pre-Plating dimensions for external threaded parts: For external threads subtract the max plating thickness from the high limit Pitch Diameter, and then subtract the minimum plating from the low limit Pitch Diameter For the minor and major diameters reduce the maximum diameters by half the maximum plating and reduce minimum diameter by half the minimum plating. To determine Pre-Plating dimensions for internal threaded parts: For internal threads add the max plating thickness to the low limit of the Pitch Diameter, and then add the minimum plating thickness to the high limit of the Pitch Diameter. For minor and major diameters incr...