What are API 6A Fasteners?
API 6A fasteners are Industrial Engineering Works products used in wellhead, Christmas tree, pressure-control and other oil & gas equipment where reliable mechanical connections are essential. ASTM A193 Grade B7 is a widely used alloy steel material for high-strength stud bolts in demanding pressure and temperature applications.
Industrial Engineering Works supplies ASTM A193 B7 stud bolts for API 6A-related applications with controlled manufacturing, dimensional inspection, material traceability and applicable quality documentation.
B7 stud bolts are commonly selected for pressure-containing and structural bolting assemblies because of their high tensile strength and suitable performance across demanding industrial operating conditions. For API 6A equipment, the fastener requirements should be matched to the applicable equipment specification, engineering requirements and any applicable API 20E qualification requirements.
Features of ASTM A193 B7 API 6A Fasteners
High Tensile Strength
ASTM A193 Grade B7 provides high mechanical strength suitable for demanding bolting assemblies used in pressure equipment, flanges, valves and oil & gas systems.
Excellent Heat Resistance
B7 alloy steel stud bolts are suitable for elevated-temperature applications when the selected grade and application conditions meet the applicable specification requirements.
Suitable for Sour Service When Specified
For sour-service applications, material selection, hardness requirements, environmental conditions and applicable NACE requirements must be evaluated and specified appropriately.
Precision Thread Manufacturing
Threads are manufactured to the required dimensional and thread standards to ensure proper engagement with compatible nuts and reliable assembly performance.
Dimensional Accuracy
Critical dimensions such as diameter, length, thread pitch and thread configuration are inspected according to applicable drawings and specifications.
Corrosion Resistant Coatings Available
Suitable coatings and finishes can be supplied according to the application, including black oxide, PTFE, Xylan, zinc and hot-dip galvanized finishes.
Applications
Material Specification
| Specification | Details |
|---|---|
| Stud Bolt Material | ASTM A193 Grade B7 |
| Compatible Nut Grade | ASTM A194 Grade 2H |
| Equipment Standard | API 6A, where applicable |
| Thread Standard | ASME B1.1 |
| Dimensional Standard | ASME B18.2.1, where applicable |
| Material Type | Alloy Steel |
| Application | High-Pressure & High-Temperature Bolting |
Available Sizes
| Parameter | Availability |
|---|---|
| Diameter | Standard & Custom |
| Length | Standard & Custom |
| Thread Type | UNC / UNF |
| Thread Configuration | Fully Threaded / Stud Bolt |
| Unit System | Imperial / Metric where specified |
| Custom Lengths | Available |
| Custom Dimensions | Available |
| Nut Compatibility | ASTM A194 2H and specified compatible grades |
Mechanical Properties
| Property | Requirement |
|---|---|
| Tensile Strength | As specified by ASTM A193 Grade B7 |
| Yield Strength | As specified by ASTM A193 Grade B7 |
| Hardness | Controlled according to applicable specification |
| Elongation | Verified according to applicable material requirements |
| Testing | Applicable mechanical and material testing |
Available Coatings
Black Oxide
Black oxide can be supplied for suitable applications where a protective surface finish is required.
PTFE
PTFE coating can provide low friction and additional corrosion and chemical resistance for applicable applications.
Xylan
Xylan coatings can be supplied where enhanced corrosion protection, reduced friction and improved surface performance are required.
Hot-Dip Galvanized
Hot-dip galvanizing provides a zinc protective layer for suitable applications requiring enhanced atmospheric corrosion resistance.
Zinc Plated
Zinc plating provides an additional protective finish for applicable industrial environments.
Why Choose Industrial Engineering Works?
API Standard Manufacturing
Fasteners are manufactured according to applicable API, ASTM and project requirements.
Mill Test Certificates
Material Test Certificates can be supplied to document material chemistry, mechanical properties and heat identification.
Third-Party Inspection
Independent inspection can be arranged according to customer, EPC or project requirements.
Global Export
Industrial Engineering Works supports international customers with export-ready packaging and worldwide shipping.
Fast Delivery
Efficient manufacturing and order coordination help support time-sensitive oil & gas and industrial projects.
Custom Manufacturing
Custom diameters, lengths, threads, finishes and configurations can be supplied according to customer requirements.
ISO Quality
Quality-controlled manufacturing and inspection processes support consistent product conformity.
Competitive Pricing
Competitive pricing is offered while maintaining the required material, manufacturing and inspection standards.
Why USA Buyers Choose Our API 6A Fasteners
Frequently Asked Questions
What are API 6A Fasteners?
API 6A fasteners are fastening products used with equipment and assemblies covered by API Specification 6A, including wellheads, Christmas trees, valves and pressure-control equipment. The applicable fastener material and qualification requirements depend on the equipment and project specification.
Why are ASTM A193 B7 Stud Bolts used?
ASTM A193 B7 stud bolts offer high tensile strength and suitable mechanical performance for demanding industrial bolting applications, including specified high-pressure and high-temperature oil & gas equipment.
What industries use API 6A Fasteners?
They are used across oil & gas production, wellhead equipment, drilling, offshore operations, petrochemical plants, refineries and pressure-control equipment.
Can you manufacture custom sizes?
Yes. Custom B7 stud bolts can be manufactured according to required diameter, length, thread configuration, material requirements and customer drawings.
Do you supply ASTM A194 2H Nuts?
Yes. Compatible ASTM A194 Grade 2H heavy hex nuts can be supplied for applicable ASTM A193 B7 stud bolt assemblies.
Do you export to the USA?
Yes. Industrial Engineering Works supplies ASTM A193 B7 stud bolts and related fasteners to customers and projects in the USA, with worldwide export capabilities.
Can you provide EN 10204 3.1 or 3.2 certification?
Yes. EN 10204 3.1 or 3.2 documentation can be supplied where specified by the customer, project, inspection agency, or applicable requirements.
Do you export API 6A Heavy Hex Nuts to the USA?
Yes. Industrial Engineering Works supplies API 6A Heavy Hex Nuts to customers throughout the USA and supports worldwide export requirements.