Hastelloy screws China Inc. stocks high nickel alloy and specialty stainless bolts in a variety of styles and threads including hex bolts, hex head cap screws, heavy hex bolts and carriage bolts. Our specialty bolts meet the most recent ASME and IFI quality standards and are available in a variety of materials including Hastelloy C-276, Titanium (Grade 2, Grade 5 and Grade 7) and Stainless Steel.