Repsol Steel LLP is a trusted supplier of industrial fasteners for construction projects, supplying a comprehensive range of structural bolting and fastening products to construction contractors, EPC firms, and procurement teams across Africa, USA, Mexico, Oman, and Europe. Our construction fastener range includes structural bolts, hex bolts, stud bolts, hex nuts, flat washers, and spring washers — manufactured in ASTM A325, A490, A193 B7, A194 2H, SS304, SS316, alloy steel, and exotic alloys in accordance with ASME B18.2.1, ASME B18.2.2, ASTM A325, ASTM A490, ASTM A193, and ASTM A194. Every shipment is supplied with full documentation, EN 10204 3.1 certification, and export-grade packaging suited to construction project requirements.
With over 25 years of combined industry experience and a proven export network, we serve clients across Africa, the United States, Mexico, Oman, and Europe — including industrial construction projects, infrastructure development, refineries, petrochemical plants, power plants, and commercial building projects. Our construction fastener supply operations are structured to meet the documentation, packaging, and compliance requirements of international construction procurement — including Material Test Certificates (MTC), dimensional inspection reports, ASTM A325/A490 compliance, ASME B18.2.1 compliance, PMI testing, Certificate of Origin, and third-party certification where required.
Whether you require A325 structural bolts for a steel structure in Oman, A490 high-strength bolts for a bridge project in Mexico, A193 B7 stud bolts for a power plant construction in Europe, SS316 hex bolts for a marine construction project in Africa, or flat washers for a large-scale industrial construction in the USA — Repsol Steel LLP supplies the right construction fastener solution, on time, with complete export documentation.
A complete construction fastener supply portfolio covering structural bolts, hex bolts, stud bolts, hex nuts, flat washers, and spring washers in ASTM A325, A490, A193 B7, A194 2H, SS304, SS316, and alloy steel — engineered for reliable structural bolting in construction projects.
High-strength structural bolts supplied for steel structures, bridges, and industrial construction. Available in ASTM A325 and A490 grades per ASME B18.2.1 and RCSC specifications.
Grades: ASTM A325, A490, A325M, A490M
Compliance: ASME B18.2.1, RCSC
Size Range: M12 to M36
High-strength hex bolts supplied for general construction, structural, and flanged connections. Available in A193 B7, B16, B8, B8M, SS304, and SS316 grades.
Grades: A193 B7, B16, B8, B8M, SS304, SS316
Compliance: ASME B18.2.1
Size Range: M6 to M100
Stud bolts threaded on both ends supplied for construction flanged connections and structural assemblies. Available in A193 B7, B7M, B8, B8M, B16, L7 grades.
Grades: A193 B7, B7M, B8, B8M, B16, L7
Compliance: ASTM A193
Size Range: M6 to M48
High-strength hex nuts supplied for use with structural bolts, hex bolts, and stud bolts. Available in A194 2H, 4, 8, 8M, A563 Grades C and DH3, SS304, and SS316.
Grades: A194 2H, 4, 8, 8M; A563 Gr. C, DH3; SS304, SS316
Compliance: ASME B18.2.2
Size Range: M6 to M100
Flat washers and spring washers supplied for load distribution and vibration resistance in structural and construction assemblies. Available in ASTM F436 hardened washers.
Grades: ASTM F436, SS304, SS316, CS
Compliance: ASME B18.22.1, DIN 125, DIN 127
Size Range: M3 to M56
Custom-manufactured bolts, stud bolts, nuts, and washers supplied for construction projects in non-standard sizes, materials, thread specifications, and coatings per drawings.
Grades: A325, A490, A193 B7, SS316, Duplex
Compliance: ASME B18.2.1, Custom
Size Range: M6 to M100
Industrial fasteners for construction projects are supplied in different materials and grades to suit specific structural, environmental, and load requirements across Africa, USA, Mexico, Oman, and Europe. We supply construction fasteners in the following materials and grades:
All construction fasteners we supply are accompanied by Material Test Certificates (MTC to EN 10204 3.1/3.2) confirming the exact grade, mechanical properties, and heat number — ensuring full traceability and compliance with international construction project specifications. PMI testing is available on request.
| Parameter | Specification |
|---|---|
| Product Types | Structural Bolts, Hex Bolts, Stud Bolts, Hex Nuts, Flat Washers, Spring Washers, Threaded Rods, Custom |
| Materials | Structural Steel (A325, A490), Carbon Steel (A193 B7, A194 2H), Stainless Steel (SS304, SS316, A193 B8, B8M, A194 8, 8M), Alloy Steel (A193 B16, B7, F11, F22, F91), Duplex (F51, F53, F55), Exotic Alloys (Monel, Inconel, Hastelloy) |
| Size Range | M6 to M100 standard; larger sizes available on request |
| Mechanical Properties | A325: 120 ksi min tensile; A490: 150 ksi min tensile; A193 B7: 125 ksi min tensile; SS316: 75 ksi min tensile |
| Standards Compliance | ASME B18.2.1, B18.2.2, B18.22.1, ASTM A325, A490, A193, A194, A563, F436, DIN, ISO, JIS, IS |
| Coatings Available | Hot-dip galvanized, zinc-plated, mechanical galvanized, PTFE, Xylan, zinc-nickel, fluoropolymer |
| Export Documentation | Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, MTC (EN 10204 3.1) |
| Inspection Options | PMI testing, hardness testing, tensile testing, third-party inspection (SGS, BV, TUV, Intertek) available on request |
| Additional Documentation | RCSC compliance, impact test reports, NACE MR0175 compliance available on request |
Construction fasteners are critical for ensuring structural integrity, load transfer, and long-term safety in industrial construction, infrastructure, and building projects across Africa, USA, Mexico, Oman, and Europe. Before finalizing construction fasteners, our technical team recommends evaluating four key factors:
If you are unsure which construction fasteners best suit your project, our technical team is available to review your structural drawings, load requirements, and project specifications — and recommend the most suitable construction fastener solution.
We have supplied construction fasteners to buyers across Africa, the USA, Mexico, Oman, and Europe — building a supply track record that reflects reliability, compliance, and on-time delivery for industrial construction, infrastructure, and building projects.
Every construction fastener shipment is accompanied by complete export documentation — Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, Material Test Certificates (MTC to EN 10204 3.1/3.2), and third-party inspection reports on request.
Our construction fasteners comply with ASME B18.2.1, B18.2.2, B18.22.1, ASTM A325, A490, A193, A194, A563, F436, DIN, ISO, JIS, and IS standards — ensuring that products meet the exact specifications of international construction projects.
Construction fasteners are packed with rust-preventive coating and moisture-resistant export-grade packaging designed for long-distance sea, air, and road transport to Africa, USA, Mexico, Oman, and Europe.
We support a range of Incoterms — FOB, CIF, CFR, EXW, DAP — and coordinate with trusted freight partners for sea, air, and multimodal shipments to major ports across Africa, USA, Mexico, Oman, and Europe based on buyer preference.
Our support team assists construction buyers with fastener selection, material grade selection, coating selection, documentation, shipping coordination, and post-delivery follow-up — ensuring a smooth experience at every stage of construction fastener procurement.
Repsol Steel LLP supplies construction fasteners to a wide range of construction applications across Africa, USA, Mexico, Oman, and Europe where structural integrity, load transfer, and reliable bolting are essential for construction safety and long-term performance.
A325 and A490 structural bolts supplied for steel structures, industrial sheds, warehouses, and fabrication assemblies across Africa, USA, Mexico, Oman, and Europe.
A193 B7 and A194 2H fasteners supplied for refinery and petrochemical plant construction — including structural steel, pipe racks, equipment anchoring, and flanged connections.
High-strength A193 B16 and alloy steel bolts supplied for power plant construction — including boiler structures, turbine foundations, and high-temperature equipment anchoring.
A490 high-strength structural bolts supplied for bridge construction, highway infrastructure, and heavy civil engineering projects requiring high-strength connections.
SS316 and duplex fasteners supplied for marine construction, port facilities, and coastal infrastructure where chloride resistance is essential.
Construction fasteners supplied in bulk to EPC contractors and fabrication units for steel structures, pipe racks, skids, modular systems, and industrial construction assemblies — with quick turnaround times and documentation support.
Repsol Steel LLP is recognized as a reliable supplier of industrial fasteners for construction projects in Africa, the USA, Mexico, Oman, and Europe. Our export documentation, packaging, and standard compliance are structured for smooth cross-border supply to construction buyers worldwide — ensuring your construction fasteners arrive on time, in specification, and ready for installation.
Africa: Industrial construction, mining, infrastructure & refinery projects
USA: Industrial construction, infrastructure, refinery & power plant projects
Mexico: Industrial construction, refinery, petrochemical & infrastructure projects
Oman: Industrial construction, refinery, infrastructure & power plant projects
Europe: Industrial construction, chemical, power & infrastructure projects
All construction fasteners are supplied with material certificates, dimensional inspection reports, PMI testing, Certificate of Origin, impact test reports, and third-party certification as required by construction project specifications.
Yes. We are a leading supplier of industrial fasteners for construction projects serving buyers across Africa, the USA, Mexico, Oman, and Europe — supplying A325 and A490 structural bolts, A193 B7 stud bolts, A194 2H hex nuts, SS304 and SS316 hex bolts, and flat washers for industrial construction, infrastructure, refinery, power plant, and building projects.
ASTM A325 structural bolts are high-strength bolts with a minimum tensile strength of 120 ksi, widely used for general structural steel connections. ASTM A490 structural bolts are higher-strength bolts with a minimum tensile strength of 150 ksi, used for larger and more heavily loaded connections, and are required to be galvanized or coated in some applications. A490 bolts should not be hot-dip galvanized due to hydrogen embrittlement risk.
We provide complete export documentation — Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, Material Test Certificates (MTC to EN 10204 3.1/3.2), and RCSC compliance documentation for structural bolts. PMI testing, tensile testing, and third-party inspection reports (SGS, BV, TUV, Intertek) are available on request.
We support FOB, CIF, CFR, EXW, and DAP Incoterms. We coordinate with trusted freight partners for sea, air, and multimodal export shipments to major ports across Africa, USA, Mexico, Oman, and Europe based on buyer preference.
Yes. We supply construction fasteners in bulk quantities for large construction projects, EPC contracts, and long-term supply agreements. Custom sizes, materials, coatings, and thread specifications are available based on structural drawings, project specifications, and bill of materials (BOM) — with quick turnaround times for bulk orders.
Send us your construction fastener specifications, material and coating 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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