? Cast Iron Wing Nuts?? ? We are able to supply the products as follows: ? 1) Materials include: Stainless Steel, Carbon Steel, Alloy Steel, Ductile Iron, Grey Iron, Copper, Aluminum Bronze, Malleable Iron etc. ? 2) Process: Investment Casting, Sand Casting (Resin Sand Casting, Green Sand Casting), Permanent Casting, Die Casting, Centrifugal Casting, Forging and Stamping etc. ? 3) Machining Types: Machined by Round Bar and steel plate, Drilling, Milling, Turning, Boring, Slating, Grinding,, NC/CNC Machining etc. ? 4) Tolerance is controlled by CMM Machine. ? 5) OEM Service ? 6) Special design is available. ? 7) ISO9001:2000 ? 8) Standard: ASTM, BF,BS, JIS, UNI, ?ANSI, ISO etc.