Repsol Steel LLP is a trusted industrial fasteners supplier for the USA, supplying a comprehensive range of bolting products to American industrial buyers, EPC contractors, and procurement teams. From hex bolts and stud bolts to nuts, washers, and custom fasteners — every product is supplied with full documentation, compliance certification, and international packaging standards suited to U.S. project requirements.
With over 25 years of combined industry experience and a proven export network, we serve clients across the United States — including Oil & Gas, petrochemical, refinery, power generation, and chemical processing facilities in key industrial regions such as Texas, Louisiana, California, and the Gulf Coast. Our supply operations are structured to meet the documentation, packaging, and compliance requirements of U.S. industrial procurement — including Material Test Certificates (MTC), mechanical test reports, NACE compliance, and third-party certification where required.
Whether you require standard SS316 bolts for a petrochemical plant in Texas, B7 studs with 2H nuts for a refinery in Louisiana, or custom alloy steel fasteners for a wellhead application in the Gulf Coast — Repsol Steel LLP delivers the right industrial fastening solution, on time, with complete export documentation.
A complete industrial fasteners supply portfolio covering hex bolts, stud bolts, nuts, washers, and custom fasteners — engineered for high-pressure and high-temperature flanged joints across the USA.
Standard hex head bolts supplied to the USA for flanged joints, structural connections, and general industrial fastening. Available in stainless steel, carbon steel, and alloy steel.
Compliance: ASME B18.2.1, ASTM A193
Materials: SS304, SS316, B7, B7M, B16
Size Range: ½" to 4"
Hex nuts supplied to the USA to pair with bolts and studs for flanged joints. Available in stainless steel, carbon steel, and alloy steel in various grades.
Compliance: ASME B18.2.2, ASTM A194
Grades: 2H, 2HM, 4, 7, 8, 8M
Size Range: ½" to 4"
Double-end stud bolts supplied to the USA for flanged joints with through-holes. The standard choice for pipeline flanges, valve bonnets, and high-pressure flanged connections.
Compliance: ASME B18.31.2, ASTM A193
Materials: B7, B7M, B16, SS304, SS316
Size Range: ½" to 4"
Flat washers and hardened washers supplied to the USA for load distribution and surface protection in bolted joints. Available in stainless steel and carbon steel.
Compliance: ASME B18.22.1, ASTM F436
Types: Flat, Hardened, Spherical
Materials: SS304, SS316, Carbon Steel
High-strength alloy steel fasteners supplied to the USA for high-pressure and high-temperature flanged joints in Oil & Gas, refinery, and power generation applications.
Compliance: ASTM A193, ASTM A194, ASTM A320
Grades: B7, B7M, B16, L7, 2H, 4, 7, 8
Applications: High-pressure, high-temperature, low-temperature
Non-standard sizes, materials, and fastener configurations supplied to U.S. drawings and project specifications — including specialty head types and coatings.
Options: Custom sizes, exotic alloys, coatings
Supply: Based on drawings or equipment specifications
Industrial fasteners are supplied to the USA in different materials and grades to suit specific pressure, temperature, and media conditions. The material grade determines the mechanical strength, corrosion resistance, and temperature capability of the fastener. We supply industrial fasteners to the USA in the following materials and grades:
All industrial fasteners we supply to the USA are accompanied by Material Test Certificates (MTC) confirming the exact grade, mechanical properties, and heat number — ensuring full traceability and compliance with U.S. project specifications. NACE compliance and H2S service documentation are available for sour service applications.
| Parameter | Specification |
|---|---|
| Fastener Types | Hex Bolts, Hex Nuts, Stud Bolts, Washers, Custom Fasteners |
| Materials | Stainless Steel (SS304, SS316, SS321), Carbon Steel, Alloy Steel (B7, B7M, B16), Exotic Alloys (Monel, Inconel, Hastelloy, Duplex) |
| Bolt Grades | ASTM A193 B7, B7M, B16; ASTM A320 L7, L7M; A307, A325; SS304, SS316, SS321 |
| Nut Grades | ASTM A194 2H, 2HM, 4, 7, 8, 8M; SS304, SS316, SS321 |
| Size Range | ½" to 4" standard; larger sizes available on request |
| Length Range | Custom lengths available per project specifications |
| Thread Types | UNC, UNF, BSW, Metric (M) — per ASME B1.1 |
| Coatings | Plain, Zinc Plated, Hot-Dip Galvanized, Xylan, PTFE, Cadmium |
| Standards Compliance | ASTM A193, ASTM A194, ASTM A320, ASME B18.2.1, ASME B18.2.2, ASME B18.31.2 |
| Export Documentation | Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, MTC (EN 10204 3.1) |
| Inspection Options | Third-party inspection (SGS, BV, TUV, Intertek) available on request |
| Additional Documentation | Hardness test reports, NACE compliance, H2S service documentation available on request |
Correct industrial fastener selection is critical to ensuring a leak-free flanged joint and long-term operational safety. The bolt grade, nut grade, material, and coating must be matched to the operating pressure, temperature, and media. Our technical team recommends evaluating four key factors before finalizing an industrial fastener for U.S. projects:
If you are unsure which industrial fastener specification best suits your U.S. application, our technical team is available to review your flange drawings, process data, and project specifications — and recommend the most suitable fastening solution.
We have supplied industrial fasteners to buyers across the United States — building a supply track record that reflects reliability, compliance, and on-time delivery to U.S. projects.
Every shipment to the USA is accompanied by complete export documentation — Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, Material Test Certificates (MTC to EN 10204 3.1), and third-party inspection reports on request.
Our industrial fasteners supplied to the USA comply with ASTM A193, ASTM A194, ASTM A320, ASME B18.2.1, ASME B18.2.2, and ASME B18.31.2 standards — ensuring that products meet the exact specifications of U.S. industrial projects.
Fasteners are packed in durable, moisture-resistant packaging designed for long-distance sea, air, and road transport to the USA — protecting product integrity from factory to destination.
We support a range of Incoterms — FOB, CIF, CFR, EXW, DAP — and coordinate with trusted freight partners for sea, air, and multimodal shipments to the USA based on buyer preference.
Our support team assists U.S. buyers with documentation, shipping coordination, and post-delivery follow-up — ensuring a smooth experience at every stage of procurement.
Repsol Steel LLP supplies industrial fasteners to a wide range of process industries across the United States, where reliable bolting performance is essential for safety and operational reliability.
Industrial fasteners supplied for wellhead equipment, Christmas trees, pipeline flanges, and high-pressure process piping in U.S. upstream, midstream, and downstream operations.
Bolting solutions supplied for reactors, heat exchangers, process piping, and storage systems handling hydrocarbons at high pressures and temperatures across U.S. petrochemical hubs.
High-temperature alloy steel fasteners supplied for high-pressure and high-temperature flanged joints in crude distillation, catalytic cracking, and hydroprocessing units at U.S. refineries.
High-temperature fasteners supplied for boilers, steam systems, turbine connections, and high-pressure auxiliary piping in U.S. thermal and nuclear power plants.
SS316 and exotic alloy fasteners supplied for aggressive chemical and corrosive media applications in U.S. chemical plants, storage tanks, and process equipment.
Exotic alloy fasteners supplied for subsea wellhead equipment, manifolds, and flowlines per API 17D — with Monel and Inconel for seawater and high-pressure service in the Gulf of Mexico.
Industrial fasteners supplied to U.S. fabrication units and EPC contractors for piping spools, skids, and modular process systems — with quick turnaround times and documentation support.
Repsol Steel LLP is recognized as a reliable industrial fasteners supplier for the USA for procurement teams, EPC contractors, and maintenance projects. Our export documentation, packaging, and standard compliance are structured for smooth cross-border supply to buyers in the United States — ensuring your fasteners arrive on time, in specification, and ready for installation.
Gulf Coast: Oil & Gas, refinery & petrochemical projects (Texas, Louisiana)
Midwest: Chemical processing, power generation & industrial fabrication
West Coast: Refinery, chemical & power projects (California, Washington)
East Coast: Petrochemical, chemical & industrial sealing applications
Gulf of Mexico: Subsea & offshore fasteners for API 17D applications
Nationwide: EPC contractors & fabrication units across all U.S. states
All industrial fasteners are supplied with material certificates, mechanical test reports, and third-party certification as required by U.S. project specifications.
Yes. We supply industrial fasteners to buyers across the United States, serving Oil & Gas, petrochemical, refinery, power generation, and chemical processing projects with full export documentation and compliance certification.
We supply hex bolts, hex nuts, stud bolts, washers, and custom fasteners in stainless steel, carbon steel, alloy steel, and exotic alloys — for flanged joints and structural applications across Oil & Gas, petrochemical, refinery, and power generation industries.
We supply fasteners in ASTM A193 B7, B7M, B16; ASTM A194 2H, 2HM, 4, 7, 8, 8M; ASTM A320 L7, L7M; ASTM A307; ASTM A325; and SS304, SS316, SS321 grades. Exotic alloys including Monel, Inconel, Hastelloy, and Duplex are also available.
We provide complete export documentation — Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, and Material Test Certificates (MTC to EN 10204 3.1). Third-party inspection reports (SGS, BV, TUV, Intertek) are available on request.
Yes. We offer custom sizes, lengths, materials, coatings, and industrial fastener configurations based on drawings, equipment specifications, and U.S. project requirements — with quick turnaround times.
Send us your bolt specifications, grade requirements, or drawings. Our export team will respond within 24 hours with a tailored quotation.
Repsol Steel LLP is a leading manufacturer and stockholder of high-quality piping products, serving the Oil, Gas, Petrochemical, and Nuclear industries with reliable engineering solutions.
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