Bright Bolting Grade – ASTM193 B7 / ASTM320 L7 (Imperial Sizes)

Bright Bolting Grade – ASTM193 B7/ASTM320 L7 Imperial – At our Wolverhampton facility, Midland Bright Steels stock a wide range of bright bolting grade materials in accordance with ASTM193 B7 and ASTM320 L7 standards. These high-performance bolting materials are commonly used in high-pressure, high-temperature, and cryogenic applications, making them ideal for industries such as construction, petrochemical, power generation, engineering, and heavy machinery manufacturing.

Reliable Supply & Extensive Stock Availability

We know that having immediate access to high-quality bolting materials is crucial to keeping projects on schedule. That’s why we stock an extensive selection of imperial-sized bright bolting grades in a variety of diameters and grades.

Below is a table showing our current stock availability. However, if you require a size or grade that is not listed, we encourage you to get in touch. We can source additional stock on request to meet your exact specifications.

We also offer no minimum order quantities, meaning you can purchase exactly what you need—whether it’s a single unit or a large bulk order.

Available Sizes & Grades – Bright Bolting Grade ASTM193 B7 / ASTM320 L7

1/2	•		446/448	•
9/16	•		575/577	•
5/8	•		680/683	•
3/4	•		719/721	•
7/8	•		797/800	•
1	•		912/915	•
1.1/8	•		1.038/041	•
1.1/4	•		1.162/165	•
1.3/8	•		1.286/289	•
1.1/2	•		1.411/415	•
1.5/8	•		1.541/545	•
1.3/4	•		41.661/666	•
1.7/8	•		1.785/789	•
2	•		1.911/915	•
2.1/8	•		2.161/165	•
2.1/4	•		2.409/414	•
2.1/2	•		2.909/914	•
2.3/4	•		3.161/165	•
3	•		3.407/411	•
3.1/2	•
3.3/4	•

If you don’t see the size or grade you need, contact us today, and we’ll do our best to source the right material for your project.

What Makes ASTM193 B7 & ASTM320 L7 Bolting Materials Stand Out?

Our bright bolting grades comply with ASTM193 B7 and ASTM320 L7 standards, ensuring strength, durability, and performance under extreme conditions. These bolting materials are widely used across various industries for their exceptional mechanical properties, corrosion resistance, and high tensile strength.

Key Features & Benefits:

High-Strength Performance – Designed for heavy-duty applications requiring high tensile and yield strength.
Heat & Corrosion Resistance – Excellent performance in high-temperature and corrosive environments.
Precision Manufacturing – Manufactured to tight tolerances, ensuring consistency and reliability.
Versatile Applications – Used in construction, engineering, petrochemical plants, power stations, and more.
Reliable Supply Chain – With our extensive stock, we can quickly dispatch materials to meet urgent project deadlines.

Applications of Bright Bolting Grade Materials

These materials are widely used in industries that demand high-strength fasteners to secure critical infrastructure. Some of the most common applications include:

Oil & Gas Industry – Essential for high-pressure pipelines, valves, and drilling rigs.
Power Plants & Energy Sector – Used in boilers, turbines, and heat exchangers.
Heavy Engineering & Structural Projects – Common in bridges, cranes, and industrial frameworks.
Petrochemical Industry – Resistant to corrosive environments, making them ideal for refineries.
Cryogenic Applications – ASTM320 L7 bolts are specifically designed for use in low-temperature conditions.

If you’re unsure which grade best suits your application, our experienced team can provide expert advice to help you choose the most suitable bolting material.

Why Choose Us?

At our Wolverhampton-based facility, we are committed to supplying only the best quality materials, ensuring that our customers receive reliable, high-performance bolting solutions. Here’s why we’re a trusted supplier:

• Extensive Stock Range – A wide variety of imperial sizes readily available.
• Fast & Efficient Service – Quick dispatch and on-time delivery across the UK.
• No Minimum Order – Order exactly what you need—whether it’s one unit or bulk supply.
• Special Orders Available – We can source custom sizes and grades on request.
• Knowledgeable Support Team – Our experts are always on hand to offer guidance and assistance.

How to Order

Placing an order or making an enquiry is quick and easy. If you need further information, our team is ready to help.

Call us on: 01902 341705
Email us at: enquiries@midlandbrightsteels.co.uk