Incoloy 800-800H-800HT Nuts

Incoloy 800-800H-800HT Nuts are 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.

Incoloy 800-800H-800HT Nuts are made of nickel-iron-chromium alloys with good strength and excellent resistance to oxidation and carburization in high-temperature exposure. These nickel steel alloys are identical except for the higher level of carbon in alloy 800H, and the addition of up to 1.20 percent aluminum and titanium in alloy 800HT.  Many consider the general corrosion resistance is excellent. In the solution annealed condition, alloys 800H and 800HT have superior creep and stress rupture

Since its introduction in 1963, Special Metals Corporation has altered the chemical composition (primarily its Carbon content) and within the approval of the ASME committee and then accepted that Grade 1 and Grade 2 became Incoloy 800 and Incoloy 800H respectively. To then allow for design stresses, Incoloy 800HT was then introduced. This alloy falls within the limits of 800H, however it requires a heat treatment of 2100F min.

Lightning Bolt is an ISO 9001:2008 certified manufacturer of Incoloy 800 fasteners, Incoloy 800H fasteners, and Incoloy 800HT fasteners.

Specials alloy fasteners are our “specialty”, however standard items also within our capabilities include:

Why Lightning Bolt for Incoloy 800-800H-800HT Nuts ?

Lightning Bolt & Supply has been servicing North America’s industrial fastener needs for over 25 years.  Since then, our focus on the production of high quality parts at competitive pricing has allowed us to become an industry leader.  Our niche in exotic high nickel alloy fasteners include materials such as: hastelloy, Inconel, monel, A-286, 904L, Alloy-20, duplex stainless as well as many additional alloys.

Being centrally headquartered in Baton Rouge, Louisiana, we are capable of shipping to jobsites all over the world.  Many of our industrial projects that we supply material to include anchor bolts, and also stud bolts of many different ASTM grades.  These include B7, L7, B16, B8, B8M, stain hardened and many more.  In addition to being an ISO certified fastener manufacturer, we were awarded “Corporate Supplier of the Year” by WBENC.

To learn more about our products, or to place an order, please call (225) 272-6200 or send an email to  For calls placed from outside of the United States, please call 001-225-272-6200.


Contact Us

Our Team will contact you in less than 24 hours

  • This field is for validation purposes and should be left unchanged.