Incoloy 800 Hex Bolts including: Incoloy 800 fasteners, Incoloy 800H fasteners, and Inconel 800HT fasteners are all made from the 800 series of alloys patented and trade-marked by Special Metals. The nickel-iron-chromium alloy offers an excellent resistance against corrosion under high-temperature environments. Also known as UNS N08800 fasteners, UNS N08810 Fasteners, and UNS N08811 fasteners, such components are an excellent fit for hydrocarbon processing and are used in the catalysts tubing and convection/cracking tubes in ethylene production within the oil/gas industry.