Stainless Steel U Bolts: What Stainless Steel Grade Should You Use?

U-bolts are manufacturing bolts that are most typically used to secure pipes that transport fluids and gases. Their primary purpose is to produce a tightening force to keep two aspects connected. The U-bolt is connected on both ends. It is shaped like the letter “U,” as one would assume. When used to secure pipe or other components, the U-abnormal bolt’s shape gives additional stability. If corrosion behaviour is required, stainless U-bolts are often utilised. 

Furthermore, stainless steel U bolts support enormous weights and pressures in mobility, building, construction, and automotive components. The austenitic stainless steel grade 304 is frequently utilised. Continue reading to learn about multiple grades and which one is best for your application.

Understanding The Different Stainless Steel U Bolts 

U bolts manufacturers provide stainless steel bolts in various substances, sizes, and grades. Standard, Stern Eye, Trailer, Long U Bolt, and Square are among the styles offered. Long U Bolts are shaped like a U to accommodate many parts on both sides. The U bolts feature holes on both ends and are tightened by nuts, much like threaded poles.

The bending has a different form. The bolt head of the Square U Bolts is square in appearance. This helps put right-angled parts together. Some uses need heavy-duty or high-tensile fasteners. Enormous Duty Stainless Steel U Bolts are used in mobility, building, construction, and automotive components to support heavy weights and pressure. The production process makes use of a variety of materials.

The strong corrosive resistance of 316 bolts, particularly against chloride penetration corrosion, favours them. As a result, they may be utilised as Marine U Bolts in seawater and marine industries. The sizes span from M03 to M100, with 12 to 20 inches between them. The lengths and widths are measured in standard (inch) or metrics (millimetre) units. Stainless Steel Metric U Bolts are used when the dimensions are in millimetres. 

What Stainless Steel Grade Should You Use?

U bolt manufacturers produce stainless steel U bolts such as bolts, hex nuts, U-bolts, etc. They provide stainless steel U bolts in the following stainless steel grades below which depend on your use and environmental circumstances:

302 Stainless Steel 

The carbon content of grade 302 is somewhat more significant than that of grade 304. It is available in a range of strip and wire forms. It has good corrosion resistance and may be used in food preparation, automotive, and maritime environments. It has non-magnetic characteristics as well as exceptional durability in all conditions.

304 Stainless Steel 

304 stainless steel is often used in the chemical, food preparation, and paper industries. It has a high metal level, ranging from 8 to 10.5%, and a high chrome level, ranging from 18 to 20% by mass. Additionally, it has a great resistance to air corrosion.

309 Stainless Steel 

It is well known for its excellent durability and chemical stability in high quality and sustained applications. This alloy is capable of withstanding temperatures up to 2000 °F (1093 °C). In terms of performance and durability, it outperforms 304 stainless steel.

316 Stainless Steel 

316, like 304, has a high chrome and nickel content. Silicone, magnesium, and carbon are also present in 316, although iron makes up the bulk of the composition. 316 is helpful for industrial, food preparation, marine, and distant marine industries because of its exceptional corrosion resistance. 

410 Stainless Steel

Its most basic form is austenitic stainless steel, which created a class of highly corrosive stainless compositions that could be heat-hardened. Grade 410 is malleable and ductile, and it is used in operations requiring high durability, mild temperature, and corrosion resistance.

B-8 Stainless Steel 

It is not magnetic and has excellent corrosion resistance in high-temperature, heavy-duty and particular applications like pipe and gauge fastening. B-8 stainless steel does have mechanical properties of 75,000 psi and is made of the same composition as AISI type 304.

B-8M Stainless Steel 

Its substance is comparable to B8, but with the addition of Molybdenum. Hex screws, nuts, and other bolts are prevalent in the B8M standard since it has superior corrosion resistance compared to B8.

17-4 PH Stainless Steel 

It is an austenite stainless steel with chrome, copper, and metal that is used for purposes that need extra durability and mild corrosive resistance. Aircraft component sections, bolts, pump strokes, valve segments, industrial and food production facilities, and nuclear elements are just a few stainless 17-4 PH uses.


Stainless Steel U Bolts are corrosion-resistant and long-lasting bolts that are perfect for maritime, manufacturing, and building components. They are used to frame pipelines or keep cables together and have screw holes on both ends. Furthermore, it would be best to choose austenitic stainless steel when choosing a bolt that can withstand corrosive conditions. The large quantities of chrome and nickel in austenitic stainless steels give remarkable corrosion resistance and good mechanical qualities. Types 304 and 316 are two of the most commonly utilised stainless steel grades.

David Curry

Read Previous

5 Things You Need To Know When Purchasing River Tables

Read Next

Tips to manage your mental health while searching for work