API 6A Fasteners (ASTM A193 B7 Stud Bolts)
ASTM A193 B7 stud bolts are widely used for high-pressure and high-temperature bolted connections in oil & gas, wellhead, pressure control and other critical industrial equipment. Industrial Engineering Works supplies API 6A fasteners manufactured to specified material, dimensional and application requirements, with custom sizes and supporting quality documentation available as required.
What Are API 6A Fasteners?
API 6A Standard and Applications
API 6A establishes requirements for wellhead and Christmas tree equipment used in oil and gas production. Fasteners used with this equipment must be selected and supplied according to the applicable equipment specifications, material requirements and project requirements.
ASTM A193 B7 Material for API 6A Fasteners
ASTM A193 Grade B7 is a chromium-molybdenum alloy steel specification commonly used for high-strength bolting. B7 stud bolts can be supplied in various diameters, lengths and thread configurations according to customer requirements.
Fasteners for Wellhead and Pressure Control Equipment
B7 stud bolts are suitable for specified bolted connections in wellhead, pressure control and related oil & gas equipment. Matching nuts, such as ASTM A194 Grade 2H where specified, can also be supplied.
Features of ASTM A193 B7 API 6A Fasteners
Applications of API 6A Fasteners
Oil & Gas Production
API 6A fasteners can be used in specified bolted connections throughout oil and gas production equipment.
Wellhead Equipment
B7 stud bolts are used for selected high-pressure bolted connections associated with wellhead equipment.
Christmas Trees
Fasteners are used in bolted connections within Christmas tree and related pressure-control equipment according to equipment specifications.
Pressure Control Systems
High-strength stud bolts can support critical bolted connections in pressure-control equipment.
Offshore Platforms
Suitable fastener materials and coatings can be selected for specified offshore oil and gas applications.
Petrochemical Plants
API 6A-related fasteners and B7 stud bolts can also support demanding bolted connections in petrochemical and process environments where specified.
API 6A Fastener Material & Standards
API 6A fasteners can be supplied according to applicable project and customer requirements, including:
- ASTM A193 Grade B7
- ASTM A194 Grade 2H Nuts
- API 6A
- ASME B18.2.1
- ASME B1.1
Applicable standards and material requirements should be confirmed against the equipment specification and project documentation before ordering
Available Sizes & Configurations
| Requirement | Availability |
|---|---|
| Diameter | Customer specified |
| Length | Customer specified |
| UNC Threads | Available where specified |
| UNF Threads | Available where specified |
| Imperial Sizes | Available |
| Metric Sizes | Where applicable |
| Custom Lengths | Available |
| Custom Configurations | Available based on requirements |
Mechanical Properties of ASTM A193 B7
| Property | Details |
|---|---|
| Material Grade | ASTM A193 B7 |
| Tensile Strength | 125 ksi min. |
| Yield Strength | 105 ksi min. |
| Hardness | Typically controlled according to ASTM A193 requirements |
| Elongation | According to applicable ASTM requirements |
Why Choose Industrial Engineering Works?
Material Traceability
Material documentation and traceability can be provided according to project requirements.
Mill Test Certificates
Material test certificates can be supplied where required with the order.
Third-Party Inspection
Third-party inspection can be arranged when specified by the customer or project.
Custom Manufacturing
Custom stud bolts and fasteners can be produced according to drawings, specifications and dimensional requirements.
Quality Inspection
Dimensional, material and applicable mechanical inspections can be performed according to the required specifications.
Export Support
Industrial Engineering Works supports international supply requirements for industrial and oil & gas projects.
Competitive Lead Times
Production and delivery schedules can be coordinated according to project quantities, specifications and required delivery dates.
Material Test Certificates (MTC)
Material Test Certificates can be supplied to document material chemistry, mechanical properties, heat treatment, and applicable traceability.
Full Batch Traceability
Batch and lot identification support traceability through applicable material procurement, manufacturing, inspection, testing, and final supply stages.
Available Coatings
Black Oxide
Black oxide may be specified where a dark protective finish is required.
PTFE
PTFE-based coatings can provide a low-friction and corrosion-resistant surface where specified.
Xylan
Xylan coatings may be selected for enhanced surface protection and controlled friction characteristics where required.
Hot-Dip Galvanized
Hot-dip galvanizing can provide additional corrosion protection for suitable applications when specified.
Zinc Plated
Zinc plating may be available for applications requiring additional surface protection.
API 6A Fasteners for USA Oil & Gas Applications
Frequently Asked Questions
What are API 6A fasteners?
API 6A fasteners are bolting components used with equipment covered by API Specification 6A, including wellhead and Christmas tree equipment and associated pressure-containing connections.
Why are ASTM A193 B7 stud bolts used for API 6A applications?
ASTM A193 B7 stud bolts provide high mechanical strength and are commonly used for demanding industrial bolted connections where the specified material requirements call for B7 alloy steel bolting.
What nuts are used with ASTM A193 B7 stud bolts?
ASTM A194 Grade 2H nuts are commonly paired with ASTM A193 B7 stud bolts when required by the applicable specification or project requirements.
What sizes of API 6A fasteners are available?
API 6A-related B7 stud bolts can be supplied in various diameters, lengths and thread configurations. Custom dimensions can also be considered based on drawings or specifications.
Can you supply custom API 6A fasteners?
Yes. Custom stud bolts and related fasteners can be supplied according to customer drawings, specifications, dimensions and application requirements.
Do you supply API 6A fasteners to the USA?
Yes. Industrial Engineering Works supports supply of specified API 6A-related fasteners and ASTM A193 B7 stud bolts for USA oil & gas and industrial projects.