Heavy Hex Bolts | Structural Bolts A325 | Structural Bolts Manufacturer

Heavy Hex Bolts | Structural Bolts A325 | Structural Bolts Manufacturer

Heavy Hex Bolts, Hex Bolts a325, Structural Steel Bolts

  • Standard:ASTM A193, A325, A490, A307, ASTM A325M
  • Sizes:M12 to M36, 1/2'' to 2 1/2''
  • Surface:HDG, Black, Plain
  • Grade:A193, A325, A490, A307

Heavy Hex Bolts, Structural Bolts A325, Structural Bolt Manufacturers, Structural Bolt Supplier

High Strength Heavy Hex Structural Bolts A325 A490

Structural bolts are high strength & heavy duty structural bolts that used in steel structures or steel to steel connections in strcutural frame such as steel structure, space frame, buidlings and bridges, etc. The most common seen structural bolts our customers using are ASTM A193, A325 and A490, A307 and they usually work with structural nuts ASTM A563 and washers F436. Ningbo Fastenwell as one of the top 10 structural bolts manufacturer and A325 bolts suppliers in China, we manufacturer and supply entire set of structural bolts and nuts for regular and potential customers.


Heavy hex bolts and structural bolts are a mainstay of Fastenwell bolts range, especially ASTM A193, A325, A490, A307, which are mostly required and used in construction projects like space frame, steel structure, tunnel and bridge, railway, oil and gas, as well as wind energy industry. Heavy hex structural bolts offer high strength and durability in these hostile applications. If you are looking for structural bolt suppliers or heavy hex bolt suppliers, please feel free to ask us, we would be happy to support with our expertise.


Heavy Hex Bolts / Structural Bolts / Hex Bolt A325 Specfications

  • Material: Medium Carbon Steel, Alloy Steel
  • Size: Metric structural bolts size is M12 to M36, imperial structural bolts size is 1/2'' to 1-1/2''
  • Grade: ASTM A325, A490, A307, grade 8.8, 10.9, 12.9
  • Surface Finish: Hot dip galvanizing & Black
  • Thread: Full thread or half thread
  • Application: Construction Fasteners (steel structure, space frame bolts bridge, railway), Oil & Gas Fasteners, Petrochemical Fasteners
  • Package: Small box, or 25kgs/carton, 36cartons/pallet
  • Delivery: 30 days
  • Standard and customized structural bolts and nuts are available, for structural steel bolts specifications, please feel free to ask us.


For heavy hex bolts / structural bolts dimensions metric sizes, or Hex Bolt A325 weight, please send request at info@fastenwell.cn

Fastenwell Hex Bolts Production

Our bolts range including heavy hex bolts, hex head bolts, hex tap bolts, hexagon structural bolts, hex cap bolts, carriage bolts, hex flange bolts, hex socket head cap bolts, machine bolts etc.

If you couldnot find the bolts you want in our page, please send picture or drawing to our sales representives.

Heavy Hex Bolts / Structural Bolt and Manufacturing

Heavy Hex Structural Bolts are the main products we have in our production lines. Small boxes or regular cartons package are available. As one of the best structural bolt suppliers in China, we manufacture and supply structural bolts and nuts, seperately or assembled as customers' requirements. You will be quick responded if any structural bolts and nuts request.

What does grade A325 mean?

A325, which is ASTM A325 and an international standard for heavy hex bolts or structural bolts, from American Society for Testing and Materials, ASTM A325 bolts are used in high strength and high tension applications, and ASTM A325 bolt dimensions are metric sizes M12 to M36 and imperial sizes are 1/2'' to 1 1/2''. Fastenwell as a bolt factory and a325 bolt manufacturers, hex bolts, hex heavy bolts and heavy hex structural bolts are our main products in regular production in Asia, Middle East and America market.

What grade steel is A325?

A325 bolt grade are made of medium carbon steel, alloy steel or material B7 with high strength to used in construction applications like steel structure, space frame, building, bridge and highway projects. Structural bolts grade 8.8 and ASTM A325 galvanzied are our best sellers among customers like construction contractors and building material wholesalers. If you are looking for reliable structural bolt suupliers, please contact us freely at info@fastenwell.cn.

What is A325 material?

A325 material are heavy hex structural bolts made of medium carbon steel, alloy steel and material B7 depending on customer's requirements, which usually working in structural steel connections and heavy construction projects while working with structural nuts A563 and washers F436. As one of the main a325 bolt suppliers, we can produce, stock and supply entire set of structural bolts and nuts, washers to support customers at the best.

What is the difference between Grade 5 and ASTM A325?

ASTM A325 bolt and SAE grade 5 bolt follow different ASTM and SAE standard, A 325 bolts are mostly used for heavy construction projects while SAE grade bolts are most common seen in industrial applications for North and South Americal market.

Is A325 carbon steel?

Yes, there are a325m bolt , a325n bolt and a325t bolt, which are made of medium carbon steel, and there are also alloy steel structural bolt and stainless steel structural bolts.

Is A325 high strength?

Yes, A325 are high strength structural bolts in construction applications and projects. A325m bolt with a heavy hex head, normal shank and half thread body. Metric structural bolts sizes from M12 to M36 and imperial structural bolts are 1/2'' to 1 1/2''. Most common seen types of structural bolts are astm a307, astm a325, astm a490 structural bolts.

What is the difference between A325 and A490 bolts? (A325 vs a490)

A325 vs A490, when compare A325 and A490, both of them are heavy hex bolts or structural bolts, but grade A490 is stronger than grade A325, like grade 10.9 bolts compared with grade 8.8 bolt. However, strength isn't the only factor when choosing the right bolt. Grade A490 bolts usually are black surface, grade A325 could be black, zinc or hot dip galvanized. Grade A325 is not as strong as grade A490, but its costs will be lower and can be perfectly galvanized to resistant to corrosion. For a325 bolts sizes, dimensions and prices, please feel free to ask us by info@fastenwell.cn

Is A325 galvanized?

It depends on customer' s requirements, usually customers require structural bolts a325 galvanized or structural bolts a325 black surface, structural bolts a325 galvanized are most welcomed in construction and industrial applications.

Are A325 bolts hardened?

Yes, as per astm a325 standard, there are hardness requirements which we follow in regular production. A325 bolts can be hardened with heat treatment as per standard.

What are the most common structural bolts?

Most common seen types of structural bolts are ASTM A193, ASTM A325 and ASTM A490, these are what we produce most in regular production and exporting.

Are structural bolts high tensile?

Heavy hex structural bolts are high tensile & high strength structural bolts. Which usually refers to grade 8.8 and above grade to be used in steel structural conjunction.

How are structural bolts made?

Structural bolt and manufacturing is the same as normal hex bolt manufacturing  At Fastenwell, we produce heavy hex strutural bolts and structural bolts a325 galvanized by both hot forging and cold forging, smaller sizes usually comes with cold forging while bigger sizes often is hot forging.

What are the three types of bolts used in structural steel construction?

Types of bolts used in structural steel construction are black hex bolts, heavy hex structural bolts, structural bolts a325 galvanized etc. We are the main a325 bolt manufacturers and a325 bolt suppliers in China, and ASTM A325 and A490 are our best bolts sold in Vietnam, Korea and America market.

What is the difference between a high tensile structural bolt to an ordinary bolt?

As its name suggests, high tensile structural bolts are stronger than ordinary bolts and with higher performance, and high strength structural bolts are used in more complex and strong construction applications.

Hexvy Hex Bolts Vs Hex Bolts

Heavy hex bolts with larger and thicker heads and shorten thread than standard hex head bolts.

What is a heavy hex structural bolt?

Heavy hex structural bolts have larger and thicker heads than standard hex head bolts, they usually come in bigger sizes and high performance grade. Heavy hex structural bolts and nuts are widely used in construction applications and projects like building, bridge and road construction, especially A325 and A490, while working with heavy hex nuts / structural nuts A563 and washers F436. A comprehesive set of structural bolts, structural nuts and washers can be provided by Fastenwell as construction fasteners solutions to regular and potential customers. Please reach us at info@fastenwell.cn.

Which type of bolt is a structural bolt?

Structural bolts are high strength bolts and heavy duty bolts with a larger hexagon head than standard hex head bolts which provides a wider bearing surface to distribute the pressure and load in steel structures. Most common seen structural bolts are ASTM A325 and A490, our customers are using them for construction bolting structure.

Are A325 Bolts Heavy Hex?

Yes, The ASTM A325 are high strength heavy hex bolts / structural bolts, sizes and diameter range from 1/2'' to 1-1/2''. Heavy hex bolts / structural bolts ASTM A325 are used for structural connections which have larger and thicker heads than standard hexagon head bolts.

What are structural bolts used for?

Structural bolts are used to fasten steel to steel, or other construction materials. Structural bolts and nuts are usually used together to provide the heavy duty holds needed in steel building structure. Fastenwell manufacture and export structural bolts main to Asia, Middle East and America market for customers in construction and building materials business.

Do A325 bolts need washers?

Yes, A325 bolts require a washer under the bolts head or heavy hex nuts or structural nuts to even the pressure and prevent the bolts from tight into the surface of materials, the washers are usually F436 and structural nuts A563. We can manufacture and provide them as a entire solution for our regular and potential customers.

Are bolts A325 structural steel?

Structural bolts A325 are widely used for steel to steel structural connections in buildings and bridges. The material we used to manufacturer A325 bolts is medium carbon steel.

What grade is a 325 bolt?

ASTM A325 heavy hex structural bolts can be considered equivalent to grade 8.8 bolts, the former usually for imperial sizes, while the latter usually for metric sizes.


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