Industrial Goods and Services Casting, Molding, Machining Foundries Investment Castingprecision investmestment castings, machined investment castings Tolerances and Specs Alloy Data Lost Wax Process Machining NAS 1193 Series Washers and Fasteners Links home | about us | contact us | request info Precision Investment Castings Precision Investment Castings by AMT Inc. Using the Lost wax process , AMT Inc.'s foundry products quality ferrous and non-ferrous metal and metal alloy precision investment castings. 0.25 inches to 6 inches wall thickness as low as 0.020 inches prototypes to production ru