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Duplex stainless steel, also known as Ferrite-Austenitic stainless steel, has a mixed microstructure of austenite and ferrite. It is a steel type that consists of high strength corrosion resistant grades and is characterized into groups based on their alloy content and corrosion resistance.

Types of duplex stainless steel:

• Lean duplex – similar or lower c...

National Bolt & Nut's large inventory of standard fasteners can prevent line down situations. Read more...

What are high-tensile fasteners?

High-tensile fasteners are specialized components designed to withstand extreme stress without deforming or failing. These fasteners are graded based on their tensile strength, which measures their ability to resist breaking under tension. One of the key differentiators for most BUMAX fasteners is that they are cold formed and thread rolled. The pr... Read more...

If you require tariff-free bolts, studs , nuts, etc., you're in our sweet spot. Read more...

Fasteners are the nuts, bolts, screws, and other small components that keep machinery and components together in working order. Many fasteners work through the effective use of threads (left-hand thread and right-hand thread), which allow nuts and bolts to screw together effectively. Read more...

BUMAX SDX NORSOK fasteners are accredited to NORSOK certification and can be provided in super duplex grades. Read more...

From thermal and solar energy to wind power, alternative energy is a rapidly growing market. Most corporations are focused on reducing their environmental impact. National Bolt & Nut is able to adapt to this evolving market and respond to its needs for high strength and custom large diameter fasteners. Read more...

Protecting Devices & Equipment from Contamination

Medical professionals rely heavily on functionality and accuracy of critical medical instruments and devices Read more...

Interest rates, the election and managing longer lead times Read more...

Long length bolts are one of our many non-standard fasteners Read more...