Nascent Pipe & Tubes offers Hastelloy Alloy X Fasteners (Screws), which has some outstanding features such as durable, dimensionally stable, rust – proof and so on. These Hastelloy X Hex Head Screws has remarkably excellent dimensional constancy. Our Hastelloy X Socket Head Cap Screws is a Nickel – Copper age – hardenable alloy that combines the corrosion resistance of Alloy 400 Screws in the company of elevated power corrosion fatigue and erosion resistance.