A Guide to Stainless Steel Fasteners - Their Types & Uses

A Guide to Stainless Steel Fasteners – Their Types & Uses

Stainless steel fasteners are essential in construction, manufacturing, and other industries. These fasteners are renowned for their durability, resistance to corrosion, and high strength. Choosing the right type and grade of stainless steel fasteners can be challenging due to their diverse availability. Our blog post categorizes different types of stainless steel fasteners and highlights their applications, helping you make the appropriate selection for your project

Types of Stainless Steel Fasteners

Steel  fasteners are the most commonly used type of fasteners. These offer many advantages, including corrosion resistance, strength, and durability.

These fasteners have different categories based on their characteristics. Austenitic stainless steels are commonly used in kitchens. Ferritic stainless steels are highly resistant to stress-related corrosion cracking and scaling at high temperatures. Martensitic stainless steels are ideal for hardening processes. Duplex/super duplex stainless steels have higher strength levels compared to regular austenitic or ferritic grades. Other types include precipitation-hardened grades, which combine high strength with excellent resistance to general corrosion. Each stainless steel grade can be tailored to meet specific application requirements, including temperature resistance and increased tensile strength.

Different Grades of Stainless Steel

There are a few different grades of stainless steel, with 304 and 316 being the most popular. The main difference is that 304 is more corrosion-resistant than its counterpart, containing 18% chromium and 8% nickel. Additionally, 316 tends to have higher amounts of molybdenum in its composition, making it even more corrosion-resistant.

For applications requiring greater strength and durability, there are duplex grades of stainless steel, such as 2205 (also known as 1.4462). This grade offers excellent resistance to stress corrosion cracking due to its extremely high chlorine levels and dual microstructure consisting of ferrite and austenite phases.

Finally, for extreme temperature conditions such as cryogenic services, a special class of stainless steels called super austenitic grades, like 904L or 254 SMO, can withstand temperatures up to 650°C or even higher depending on their composition. These superalloys contain high amounts of chromium (25%) combined with molybdenum (6-9%) to offer superior protection against aggressive environments compared to conventional alloys like 304SS or 316SS.


Since stainless steel fasteners offer excellent strength and resistance to corrosion, they are useful in several industries, such as construction, marine, automotive, and manufacturing. In construction, stainless steel fasteners hold roofs, walls, and floors together. In marine industries, they are commonly used in boats, offshore drilling rigs, and other applications exposed to saltwater. Stainless steel fasteners are also ideal for manufacturing medical equipment, aircraft, and other machinery that requires high strength and resistance to corrosion.

Factors to Consider when Choosing Stainless Steel Fasteners

When choosing the right type of stainless steel fasteners for your project, consider the environmental conditions, the application, and the material you are fastening. For instance, if you are fastening two metals together, using a fastener of the same grade of stainless steel is advisable. Further, consider the load requirements and shearing forces involved in the application to ensure you pick the right fastener for the job.


Our stainless steel fasteners’ durability and corrosion resistance make them an excellent choice for several applications. They are also versatile depending on the grade of stainless steel you choose. They can resist high temperatures, acidic or alkaline conditions and withstand extreme weather conditions. Additionally, stainless steel is recyclable, making it environmentally conscious, and offers high performance at a reasonable cost.


SS fasteners have become an essential component in various industries to their strength, durability, resistance to corrosion, and cost-effectiveness. Knowing the different types, grades, and applications of stainless fasteners will help you decide when purchasing them. Consider the environmental conditions, application, and material to ensure the proper selection. High-quality SS fasteners are a long-term investment that saves time and money

A Guide to Stainless Steel Fasteners – Their Types & Uses

by Seamac Piping Solutions Inc. time to read: 2 min