Depending on your specific application and environmental conditions, standard steel hardware can rust and degrade rapidly. Stainless steel offers a critical defense against atmospheric corrosion, harsh chemicals, and extreme temperatures.

U-Bolt-It manufactures and distributes a comprehensive variety of stainless steel fasteners, including custom U-bolts, structural bolts, transport chains, and hex nuts. From food processing facilities to highly corrosive offshore marine environments, we supply the exact grade of stainless steel required to ensure your assemblies remain secure, sanitary, and structurally sound.

What Grades of Stainless Steel Do We Supply?

Not all stainless steel is created equal. We offer fasteners in a variety of grades, each alloyed to provide specific advantages in strength, temperature tolerance, and corrosion resistance.

Austenitic Stainless Steel (300 Series)

The most common class of stainless steel, prized for excellent corrosion resistance and non-magnetic properties.

  • 302 Stainless Steel: Offers excellent corrosion resistance and outstanding toughness at all temperatures. Commonly used for transport chain in food processing, industrial, and marine environments.
  • 304 Stainless Steel: The industry standard for atmospheric corrosion resistance. Highly utilized in the chemical, food processing, and paper industries.
  • 309 Stainless Steel: Best known for its high strength and oxidation resistance in continuous service applications. It withstands extreme temperatures up to 2000°F (1093°C) and is superior to 304 in both strength and corrosion resistance.
  • 316 Stainless Steel: Contains added molybdenum for superior corrosion resistance against chlorides. It is the ideal choice for coastal, offshore marine, pharmaceutical, and petroleum applications.

Martensitic & Precipitation-Hardened Stainless Steel

Alloys designed to be hardened by heat treatment for high-strength applications.

  • 410 Stainless Steel: A basic martensitic, highly machinable alloy used in applications where high strength, moderate heat, and moderate corrosion resistance are key.
  • 17-4 PH Stainless Steel: A chromium-nickel-copper alloy requiring high strength and moderate corrosion resistance. Widely used for aircraft structural parts, pump shafts, valve parts, and nuclear components.

ASTM A193 Fastener Grades

Specific material specifications designated for high-temperature and high-pressure bolting.

  • B-8 Stainless Steel: Non-magnetic with a 75,000 psi tensile strength. It is composed of the same base material as AISI type 304 stainless steel.
  • B-8M Stainless Steel: Similar to B-8 but with added molybdenum (matching 316 stainless steel). This specification is required for hex bolts and studs demanding elevated corrosion resistance.

What Types of Stainless Steel Fasteners Do We Manufacture?

We carry a vast inventory of standard hardware and custom-manufactured fasteners across multiple grades:

Fastener Category Available in 304 / B-8 Available in 316 / B-8M Available in 410 / 17-4 PH
Bolts & Screws 12-Pt Flange Screws, Hex Bolts, Socket Head Cap Screws 12-Pt Flange, Hex Bolts, Socket Head Cap, Shoulder Bolts, Set Screws TEK 3 Screws (410), Hex Bolts, Socket Head Cap (17-4)
Specialty & Rigging U-Bolts, Eye Bolts, Chain, Shackles, Wire Rope & Clips U-Bolts, Eye Bolts, Turnbuckles, Chain, Shackles, Rod Ends U-Bolts (17-4)
Nuts & Washers Hex Nuts Hex Nuts, Coupling Nuts, Eye Nuts, Wing Nuts, Locknuts, Washers Hex Nuts, Flat Washers (17-4)
Anchors & Pins Wedge Anchors, Dowel Pins, All Thread Rod

Frequently Asked Questions About Stainless Steel Fasteners

What is the difference between 304 and 316 stainless steel?

While both are highly corrosion-resistant, 316 stainless steel contains molybdenum. This addition drastically increases its resistance to chlorides, making 316 the mandatory choice for saltwater marine environments, offshore drilling, and harsh chemical processing. 304 is typically sufficient for standard atmospheric and indoor industrial exposure.

What do B-8 and B-8M specifications mean?

These are ASTM A193 specifications that denote fasteners designed specifically for high-temperature or high-pressure service. B-8 corresponds directly to the chemical makeup of 304 stainless steel, while B-8M corresponds to 316 stainless steel (due to the added molybdenum).

Can stainless steel fasteners be hardened?

Standard austenitic grades (like 304 and 316) cannot be hardened by heat treatment—only by cold working. However, martensitic grades like 410 and 17-4 PH are specifically engineered to be heat-treated, offering much higher tensile strength and hardness for highly demanding structural applications.

Why choose U-Bolt-It for your stainless steel hardware?

Because we both manufacture and distribute fasteners, we control the quality of the hardware entering your supply chain. We understand the specific metallurgical requirements of the petroleum, aerospace, and food processing industries, ensuring you receive the exact alloy needed to prevent component failure. Contact a member of the U-Bolt-It team today for a quote on standard or custom stainless hardware.

"We feel really happy working with you guys, it has been a short time business relationship but definitely we’ve received such a great service from your company that would be nice to keep working together. Junior is our contact point and there’s nothing but great things to say about his attentions. By the way, I truly loved the microfiber cloth. I’m always have a hard time to clean my glasses; I can use the one from U-bolt it without applying any liquid and just leaves them super clean. We appreciate your excellent service and looking forward to new projects. Kind regards and have a wonderful rest of the week."

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"Our buyer received a letter from your company regarding an order I put in for some 3” stainless steel U-Bolts. I just wanted to thank you for the kind letter and let you know that your U-Bolts have been completely invaluable to us. We use them in the manufacturing process of an extremely sensitive product. Our previous U-bolts were zinc plated, therefore they became rusted too easily and risked the quality of the product. We hadn’t been able to find another U-bolt supplier with our specific size requirements (without going custom) until I came across your website! We are very grateful for the quality product you have sent us. We will definitely continue to use your company and the services provided."

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"Debbie here from KKW in Mukwonago WI, just got the big u-bolts they look real good. They should work good for my project."

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K.

"I wanted to say how helpful it was to be able to order small quantities of screws from your business. As a start up business, without an established presence, it is virtually impossible to get small quantities of screws as samples. When we go into production, we will be ordering millions of screws, but we need to know that the same screws we test with our prototypes will be available at bulk prices at that time."

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