H&H Castings is ANSI/ISO/ASQ Q9001:2000 certified. These capabilities allow H&H to satisfy nearly all customer needs in-house for sand castings ranging in size from ounces to 300 pounds. Casting tolerances of +/-.020" are routine. Tolerances of +/-.010 can be attained with fully CNC machined tooling. Typical castings are housings, regulators, valves, complex parts with internally cored passageways requiring good dimensional control and fine surface finish (150 RMS to 300 RMS).