Threaded Rod

Sourcing high-strength fasteners that meet strict safety standards shouldn’t be a challenge for your project. Standard threaded rods with surface imperfections can lead to unnecessary fatigue and maintenance delays, affecting your timeline and budget. We offer precision-rolled ASTM A193 Grade B7 threaded rod designed to perform reliably in demanding industrial environments.

Request a Custom Quote –  888.997.2749

What is a Threaded Rod?

A threaded rod, also known as a stud, is a metal rod threaded along its entire length. Unlike a bolt, it lacks a head, allowing nuts to be fastened from either end. These are essential for applications requiring high tension and are available in materials ranging from low carbon to high-strength B7 steel.

Service Capabilities

We stock threaded rod in National Coarse, National Fine, Eight Pitch Series, Acme, and Metric sizes. Our inventory is maintained in 10/12 Ft Random Lengths, ensuring we are ready to serve your immediate needs.

To help our customers save money, there is no charge for our processing services to cut bars in half for UPS or FedEx Ground shipments. All material strictly conforms to the ASTM A193, Grade B7 specification.

Surface Finish

Threaded rods that are rolled instead of cut are smoother and have less surface imperfections that may cause possible failure in severe service applications. Thread rolling dies impart smooth burnished roots and flanks to threads. Rolled threads are free from tears or tool marks typically found in cut threads. Those surface imperfections contribute to fatigue failure, and may lead to catastrophic failure.

Typical Mechanical Properties

• Superior Strength: High-tensile performance with a Tensile Strength of 155,000 PSI and a Yield Strength of 135,000 PSI.
• Surface Integrity: Manufactured with Rolled Threads to ensure smooth, burnished roots and flanks, eliminating the tears and tool marks that lead to fatigue failure.
• Hardness Rating: Maintains a consistent Brinell Hardness of 321 BHN, ideal for severe service applications.
• Ductility & Toughness: Features an Elongation of 19% and a Reduction of Area of 53% to handle structural stress without brittle fracturing.
• Grain Structure: Refined Grain Size of 7, ensuring a uniform internal structure across all rods and studs.

Common Industrial Applications

ASTM A193 B7 rods are the industry standard for high-strength requirements.

• Oil & Gas: High-pressure flange bolting and pressure vessel construction.
• Construction: Heavy-duty anchoring for steel structures and bridge supports.
• Manufacturing: Heavy machinery assembly and industrial studs.
• Infrastructure: Chemical processing plants where heat and pressure resistance are vital.

Specification Conformance

ASTM A193, Grade B7

Why Choose Specialty Steel as Your Steel Distributor?

Specialty Steel is a top steel distributor that carries a wide range of metal shapes and materials, from carbon steel and aluminum to stainless steel. We specialize in being more than just a supply house; we are your technical partner.

• Efficient Inventory: We maintain a wide range of sizes and diameters in plain finish to meet your specific application.
• Quality Assurance: Every shape in our inventory is inspected to ensure it meets SAE and ASTM standards, making it easy for your team to purchase with confidence.
• Legacy of Support: With a long legacy in the metal industry, we have the expertise to support your business and serve diverse industries with ready-to-ship items.
• Cost-Effective Solutions: We help you save money and time by providing specialized processing services that simplify your order.

Request a Custom Quote –  888.997.2749

Frequently Asked Questions 

What Is The Benefit of Rolled Threads for ASTM A193 B7? 

Rolled threads are significantly stronger than cut threads because the grain flow of the steel is contoured to the shape of the thread. This results in a smoother finish that resists the “notch effect,” which often causes large-scale fatigue failure in high-strength applications.

What Is a Threaded Rod Used for? 

A threaded rod is used to join materials, stabilize structures, or hang industrial equipment. Mechanically, they are inserted into concrete anchors for machinery, passed through pipe flanges for high-pressure seals, or threaded into tapped holes in metal shapes to create a permanent mounting point.

How Do You Install a Threaded Rod? 

Since a threaded rod has no head to grip with a wrench, follow these steps for a standard installation:

1. Preparation: Drill and clean the hole (for concrete) or align the through-holes (for flanges).
2. Double-Nutting: Thread two nuts onto one end of the rod and tighten them against each other to create a temporary “head.”
3. Driving: Use a wrench on the outer nut to drive the rod into a tapped hole or anchor.
4. Seating: Once the rod is at the desired depth, use two wrenches to unlock and remove the nuts.
5. Final Fastening: Secure your part with a single nut and washer.

Why are Rolled Threads Preferred for B7 Rods? 

Rolled threads are formed by displacing the steel rather than cutting it away. This results in a smoother finish and a grain flow that follows the thread shape, which improves the longevity of the rods in high-pressure environments.

What is the Difference Between a Threaded Rod and a Stud? 

While the terms are often used interchangeably, the primary distinction is logistical: fasteners under 12 inches are typically classified as studs, while those exceeding 12 inches are referred to as threaded rods or all-thread rods (ATR).