Stainless Steel Lag Bolts and Lag Screws

Get high-quality 304 stainless steel lag bolts from our wide selection. Our lag screws are ideal for carpentry applications that require superior weather resistance compared to ordinary hardware.

2 lag bolts side

Our stainless lag bolts are strong and great for building decks, outdoor play equipment, and heavy lumber projects. The stainless steel construction ensures rust will not compromise structural integrity over time.

We carry lag bolts in a variety of diameters and lengths to meet your application requirements. Sizes range from 1/4" to 1/2" diameter and lengths between 1" to 8". Each stainless screw features coarse threading and a hex head drive so you can get proper torque for a tight, lasting connection.

Benefits of Stainless Steel Lag Bolts

When using stainless steel fasteners, you can benefit from their superior corrosion resistance. This ensures that the structural integrity of your projects will not be compromised over time, even in outdoor or high-moisture environments.

Stainless steel lag screws are known for their strength. This makes them ideal for heavy lumber projects, building decks, and outdoor play equipment. The coarse threading and hex head drive allow for proper torque application, resulting in a tight and lasting connection. By choosing stainless steel lag screws, you can enjoy reliable, long-lasting performance for your carpentry endeavors.


When installing, it's important to follow these tips for a successful and secure connection:

  1. **Pre-Drilling:** Before inserting the lag bolt, pre-drill a hole slightly smaller than the diameter of the bolt to prevent splitting the wood and ensure a precise fit.
  2. **Proper Torque:** Use a wrench to tighten the lag bolt to the recommended torque level. Over-tightening can damage the bolt or the material it's securing.
  3. **Pilot Hole Depth:** Make sure the pilot hole depth is appropriate for the length of the lag bolt to ensure a strong connection without compromising the structural integrity of the material.
  4. **Avoid Over-Drilling:** Be cautious not to over-drill the pilot hole, as this can weaken the material and reduce the holding strength of the lag bolt.
  5. **Use Washers:** Consider using washers under the bolt head to distribute the load evenly and prevent damage to the surface being fastened.

By following these installation tips, you can ensure a secure and long-lasting connection for your carpentry projects.

For specialty sizes or grades not listed here, contact our customer service team. We can source many additional varieties of stainless steel hardware. Get reliable, long-lasting performance from your next carpentry project with our stainless steel lag screws!

Lag Screw FAQ

What are the benefits of using stainless steel lag bolts?

Stainless steel lag bolts offer superior corrosion resistance, making them ideal for outdoor or high-moisture environments. They are also known for their strength, making them suitable for heavy lumber projects and building decks.

How should I install stainless steel lag bolts for a secure connection?

To ensure a successful and secure connection, follow these installation tips:

  • Pre-Drilling: Drill a hole slightly smaller than the bolt diameter to prevent wood splitting.
  • Proper Torque: Tighten the bolt to the recommended torque level using a wrench.
  • Pilot Hole Depth: Ensure the pilot hole depth matches the bolt length for a strong connection.
  • Avoid Over-Drilling: Be cautious not to over-drill the pilot hole to maintain material strength.
  • Use Washers: Consider using washers under the bolt head to distribute the load evenly.
What other products do customers frequently buy along with stainless steel lag bolts?

Customers often purchase stainless steel nuts and washers, deck screws, wood screws, and carriage bolts. For specialty sizes or grades, contact our customer service team for assistance.

Are stainless steel lag bolts suitable for marine applications?

Yes, stainless steel lag bolts are highly recommended for marine applications due to their excellent corrosion resistance properties, making them ideal for use in saltwater environments.

Can stainless steel lag bolts be used for attaching metal to wood?

Yes, stainless steel lag bolts can be used to attach metal to wood effectively. Ensure to pre-drill the appropriate pilot hole to prevent splitting and achieve a secure connection.

What is the difference between stainless steel lag bolts and galvanized lag bolts?

Stainless steel lag bolts offer superior corrosion resistance compared to galvanized lag bolts. While galvanized bolts are coated with zinc for protection, stainless steel bolts are inherently resistant to rust and corrosion.

How do I determine the right size of stainless steel lag screws for my project?

To select the correct size of lag bolts, consider the thickness of the materials you are fastening together. Choose a bolt diameter and length that will provide ample strength and penetration without compromising the integrity of the materials.