ASTM A307 Carbon Steel Fasteners are carbon steel bolts and studs manufactured according to ASTM A307 requirements for general-purpose fastening. They are commonly used in construction, piping, machinery, structural assemblies and low-pressure applications. ASTM A307 primarily covers Grade A and Grade B fasteners, with Grade B intended for certain flange and piping applications requiring controlled tensile properties.
ASTM A307 Fasteners Manufacturer, Supplier & Exporter
ASTM A307 Carbon Steel Fasteners are carbon steel bolting products designed for general-purpose fastening applications where moderate strength and reliable mechanical performance are required. The ASTM A307 specification covers carbon steel bolts and studs intended primarily for structural and general engineering applications, including piping and flange connections.
We manufacture and supply a wide range of ASTM A307 Bolts and Nuts, including hex bolts, studs, piping bolts, U-bolts and lag screws in different sizes, thread configurations, finishes and dimensions. Our SA307 Carbon Steel Fasteners can be supplied to meet applicable ASTM, ASME and dimensional requirements for industrial, commercial and construction applications.
Our product range includes A307 Gr A Hex Bolt, A307 Grade A Stud Bolt, ASTM A307 Grade B Bolts and A307 Grade B Piping Bolts, with material traceability and inspection documentation available as required.
Table of Contents
- ➤ ASTM A307 Fasteners Manufacturer, Supplier & Exporter
- ➤ ASTM A307 Fasteners Grades
- ➤ ASTM A307 Bolts and Nuts Product Range
- ➤ ASTM A307 Fasteners Specifications
- ➤ Chemical Composition of ASTM A307 Carbon Steel
- ➤ Mechanical Properties of ASTM A307 Fasteners
- ➤ ASTM A307 vs ASTM F1554 Grade 36 Anchor Bolts
- ➤ ASTM A307 Fasteners Manufacturing Process
- ➤ Surface Finishes for A307 Carbon Steel Fasteners
- ➤ Applications of ASME B18.2.1 A307 Bolts
- ➤ Why Choose Our ASTM A307 Fasteners?
- ➤ ASTM A307 Carbon Steel Fasteners Supplier & Exporter
ASTM A307 Fasteners Grades
ASTM A307 fasteners are available in different grades designed for specific applications. Selecting the correct grade depends on the required strength, connection type, dimensions and service conditions.
| Grade | Typical Product | General Application |
|---|---|---|
| ASTM A307 Grade A | Hex bolts, studs | General-purpose fastening |
| ASTM A307 Grade B | Bolts and studs | Piping, flange and pressure-related connections |
| ASTM A307 Grade C | Not currently covered in the same way as Grades A/B | Verify applicable specification/revision |
➤ A307 Grade A Hex Bolt
An A307 Gr A Hex Bolt is a carbon steel hex-head fastener used for general-purpose mechanical and structural connections. Its hexagonal head allows installation with standard wrenches, making it suitable for equipment, brackets, frames, supports and general construction.
➤ A307 Grade A Stud Bolt
An A307 Grade A Stud Bolt is a threaded fastening component that can be supplied fully threaded or in configurations appropriate to the application. Studs are commonly used where components need to be assembled and disassembled repeatedly.
➤ ASTM A307 Grade B Bolts
ASTM A307 Grade B Bolts are intended for applications where the bolting connection requires controlled mechanical properties. They are commonly associated with piping and flange connections.
➤ A307 Grade B Piping Bolts
A307 Grade B Piping Bolts are used in piping systems and flange assemblies where compatible carbon steel bolting is required. Correct bolt grade, size, thread and tightening requirements should always be selected according to the applicable piping or engineering specification.
ASTM A307 Bolts and Nuts Product Range
We supply ASTM A307 Bolts and Nuts in multiple configurations to meet different installation requirements. Available products can include:
- ASTM A307 Hex Bolts
- A307 Heavy Hex Bolts
- ASTM A307 Stud Bolts
- Fully Threaded Studs
- A307 Grade A Studs
- ASTM A307 Grade B Bolts
- A307 Piping Bolts
- ASTM A307 Nuts
- ASTM A307 U-Bolts
- ASTM A307 Lag Screws
- Machine Bolts
- Custom-made A307 fasteners
- Zinc Plated ASTM A307 Carbon Steel Bolts
Depending on project requirements, fasteners can be supplied with different thread forms, lengths, coatings, finishes and packaging arrangements.
ASTM A307 Fasteners Specifications
| Property | Details |
|---|---|
| Standard | ASTM A307 |
| Material | Carbon Steel |
| Grades | Grade A, Grade B |
| Product Forms | Bolts, studs and other applicable fasteners |
| Threads | UNC, UNF and project-specific requirements |
| Head Types | Hex and other available configurations |
| Finish | Plain, zinc plated and other available finishes |
| Application | Construction, piping, machinery, structural and general engineering |
| Inspection | Dimensional, mechanical, chemical and visual inspection as required |
Chemical Composition of ASTM A307 Carbon Steel
The chemical composition of ASTM A307 carbon steel fasteners depends on the applicable grade and product requirements. The material is primarily composed of carbon, manganese, phosphorus, sulfur, and iron.
| Element | Typical Requirement |
|---|---|
| Carbon | As per applicable ASTM A307 grade |
| Manganese | As specified |
| Phosphorus | As specified |
| Sulfur | As specified |
| Iron | Balance |
Mechanical Properties of ASTM A307 Fasteners
The mechanical properties of ASTM A307 Carbon Steel Fasteners vary according to the grade and product configuration.
| Property | Grade A | Grade B |
|---|---|---|
| Tensile Strength | As per ASTM A307 | As per ASTM A307 |
| Yield Strength | As specified | As specified |
| Elongation | As specified | As specified |
| Hardness | As applicable | As applicable |
➤ ASME SA307 Fasteners Weight Chart
| Nominal Size | Approx. Weight per 100 Pieces (kg) |
|---|---|
| 1/4" × 1" | 1.4 |
| 1/4" × 2" | 2.2 |
| 5/16" × 1" | 2.0 |
| 5/16" × 2" | 3.4 |
| 3/8" × 1" | 2.8 |
| 3/8" × 2" | 4.8 |
| 1/2" × 1" | 5.0 |
| 1/2" × 2" | 8.0 |
| 5/8" × 1" | 7.8 |
| 5/8" × 2" | 12.5 |
| 3/4" × 1" | 11.0 |
| 3/4" × 2" | 17.5 |
| 7/8" × 2" | 24.0 |
| 1" × 2" | 32.0 |
| 1-1/4" × 3" | 55.0 |
| 1-1/2" × 3" | 78.0 |
ASTM A307 vs ASTM F1554 Grade 36 Anchor Bolts
ASTM A307 and ASTM F1554 Grade 36 Anchor Bolts should not be treated as interchangeable specifications.
ASTM F1554 Grade 36 specifically covers anchor bolts used to secure structural supports to concrete foundations. ASTM A307, in contrast, primarily covers carbon steel bolts and studs for general-purpose fastening.
For foundation and structural anchoring applications, the project specification should determine whether ASTM F1554 Grade 36 Anchor Bolts or another anchor-bolt specification is required.
ASTM A307 Fasteners Manufacturing Process
Surface Finishes for A307 Carbon Steel Fasteners
Carbon steel fasteners can be supplied in different surface conditions depending on the operating environment.
- Plain Finish: Suitable for general indoor and controlled environments where additional corrosion protection is not required.
- Zinc Plated: Zinc Plated ASTM A307 Carbon Steel Bolts provide an additional layer of corrosion protection and are commonly selected for construction and general engineering applications.
- Custom Finishes: Other coatings or surface treatments may be available depending on quantity, application and technical requirements.
Applications of ASME B18.2.1 A307 Bolts
ASME SA307 Fasteners are commonly selected for applications where general-purpose carbon steel fastening is appropriate.
Typical applications include:
- Construction and infrastructure
- Structural assemblies
- Piping systems
- Flange connections
- Machinery and equipment
- HVAC installations
- General fabrication
- Industrial supports and brackets
- Commercial building projects
- Maintenance and repair work
The appropriate fastener grade should always be selected based on load requirements, service conditions, temperature, corrosion exposure and applicable engineering standards.
Why Choose Our ASTM A307 Fasteners?
Choosing the right ASTM A307 Fasteners Manufacturer can help ensure consistent quality, documentation and supply reliability for industrial projects.
We offer:
- ASTM A307 Grade A and Grade B fasteners
- Multiple bolt, stud and nut configurations
- Standard and custom dimensions
- Plain and zinc-plated finishes
- Material traceability where specified
- Dimensional and visual inspection
- Mill test certificates and inspection documents when required
- Bulk and project-based supply
- Export packaging and documentation
- Support in selecting suitable fastener specifications
As an ASTM A307 Carbon Steel Fasteners Supplier, we focus on supplying products that match the customer's specified grade, dimensions, finish and application requirements.
ASTM A307 Carbon Steel Fasteners Supplier & Exporter
We supply A307 Carbon Steel Fasteners for domestic and international requirements. Our range covers standard and project-specific requirements for bolts, studs, nuts and other applicable fastener configurations.
As an A307 Carbon Steel Bolts Exporter, we can support bulk orders with suitable packaging, identification, documentation and shipping arrangements. Customers looking for an ASTM A307 Hex Bolt Stockist can also contact us for current stock availability, sizes and quantities.
For specialized requirements, share the required ASTM/ASME specification, grade, size, quantity, finish and application so we can recommend the appropriate product configuration.
Get a Quote for ASTM A307 Carbon Steel Fasteners
Need ASTM A307 Bolts and Nuts for your next project?
Send us your required grade, bolt type, diameter, length, thread, quantity, finish and applicable standard. We can help identify the appropriate fastener configuration and provide a quotation based on your requirements.
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