Repsol Steel LLP is a leading fastener manufacturer supplying high-integrity industrial fasteners to buyers across the USA, Europe, Africa, Mexico, and Oman. We manufacture bolts, nuts, studs, washers, and custom fasteners in stainless steel, carbon steel, alloy steel, and exotic alloys — engineered for reliable bolting performance in flanged joints across Oil & Gas, petrochemical, refinery, power generation, and chemical processing applications.
With over 25 years of combined industry experience, our manufacturing facility is equipped for high-precision fastener production — including forging, threading, heat treatment, surface finishing, and testing operations. Every fastener we manufacture complies with ASTM A193, ASTM A194, ASTM A320, ASME B18.2.1, and ASME B18.2.2 standards, with full material traceability, dimensional accuracy, and documentation that meets the requirements of projects in the USA, Europe, Africa, Mexico, and Oman.
Whether you require standard SS316 bolts for a petrochemical plant in Europe, B7 studs with 2H nuts for a refinery in the USA, or custom alloy steel fasteners for a wellhead application in Africa or Oman — Repsol Steel LLP manufactures the right industrial fastening solution, on time, with complete export documentation.
A complete fastener manufacturing portfolio covering hex bolts, stud bolts, nuts, washers, and custom fasteners — manufactured for high-pressure and high-temperature flanged joints across global markets.
Standard hex head bolts manufactured 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 manufactured 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 manufactured 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 manufactured 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 manufactured 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 manufactured to your drawings and project specifications — including specialty head types and coatings.
Options: Custom sizes, exotic alloys, coatings
Supply: Based on drawings or equipment specifications
As a specialist fastener manufacturer, we follow a structured manufacturing process that ensures dimensional accuracy, material integrity, and consistent mechanical properties in every fastener we produce. Fasteners are manufactured to meet the exact requirements of high-pressure and high-temperature flanged joints.
This manufacturing process allows us to produce fasteners that perform reliably in the most demanding industrial environments — from high-pressure Oil & Gas wellheads to high-temperature refinery and petrochemical operations. Every fastener we manufacture is tested and documented to meet ASTM A193, ASTM A194, ASTM A320, ASME B18.2.1, and ASME B18.2.2 standards.
Industrial fasteners are manufactured 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 manufacture fasteners in the following materials and grades:
All fasteners we manufacture are accompanied by Material Test Certificates (MTC) confirming the exact grade, mechanical properties, and heat number — ensuring full traceability and compliance with international 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 manufactured 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 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 a fastener:
If you are unsure which fastener specification best suits your application, our technical team is available to review your flange drawings, process data, and project specifications — and recommend the most suitable fastening solution.
We specialize in fastener manufacturing — offering hex bolts, stud bolts, nuts, washers, and custom fasteners in stainless steel, carbon steel, alloy steel, and exotic alloys. All fasteners are manufactured to ASTM and ASME standards.
Our manufacturing unit is equipped for high-precision fastener production — covering forging, threading, heat treatment, surface finishing, and testing operations. This allows us to control quality at every stage of production.
Every fastener batch is backed by Material Test Certificates (MTC) and mechanical test reports, and can be supplied with NACE compliance, dimensional inspection reports, and third-party certification on request — ensuring full traceability for critical applications.
Non-standard sizes, materials, coatings, and fastener configurations are manufactured according to flange drawings, equipment specifications, and project requirements — with quick turnaround times.
We manufacture and export fasteners to clients in the USA, Europe, Africa, Mexico, and Oman — with packaging, documentation, and compliance structured for international procurement.
Our experienced technical team assists with fastener selection, bolt and nut grade matching, and installation guidance. Post-supply support includes documentation follow-up and replacement coordination.
Repsol Steel LLP manufactures fasteners for a wide range of process industries across USA, Europe, Africa, Mexico, and Oman — where reliable bolting performance is essential for safety and operational reliability.
Fasteners manufactured for wellhead equipment, Christmas trees, pipeline flanges, and high-pressure process piping in upstream, midstream, and downstream operations.
Bolting solutions manufactured for reactors, heat exchangers, process piping, and storage systems handling hydrocarbons at high pressures and temperatures.
High-temperature alloy steel fasteners manufactured for high-pressure and high-temperature flanged joints in crude distillation, catalytic cracking, and hydroprocessing units.
High-temperature fasteners manufactured for boilers, steam systems, turbine connections, and high-pressure auxiliary piping in thermal and nuclear power plants.
SS316 and exotic alloy fasteners manufactured for aggressive chemical and corrosive media applications in reactors, storage tanks, and process equipment.
Exotic alloy fasteners manufactured for subsea wellhead equipment, manifolds, and flowlines per API 17D — with Monel and Inconel for seawater and high-pressure service.
Repsol Steel LLP is recognized as a reliable fastener manufacturer for international procurement teams, EPC contractors, and maintenance projects. Our manufacturing, export documentation, and packaging are structured for smooth cross-border supply to buyers in the USA, Europe, Africa, Mexico, and Oman — ensuring your fasteners arrive on time, in specification, and ready for installation.
USA: Fastener manufacturing for Oil & Gas, petrochemical & power projects
Europe: Fasteners for chemical, refinery & process industries
Africa: Fasteners for refinery, petrochemical & subsea projects
Mexico: Fastener manufacturing for chemical plants & refinery operations
Oman: Fasteners for Oil & Gas, petrochemical & power projects
All fasteners are manufactured in India and exported with material certificates, mechanical test reports, and third-party certification as required by project specifications.
Repsol Steel LLP combines 25+ years of industry experience, an in-house manufacturing facility with forging, threading, heat treatment, and testing capabilities, compliance with ASTM and ASME standards, and a proven export track record across the USA, Europe, Africa, Mexico, and Oman.
We manufacture 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 manufacture 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 manufacture and export fasteners primarily to the USA, Europe, Africa, Mexico, and Oman, serving Oil & Gas, petrochemical, refinery, power, subsea, and chemical processing projects in these regions.
Yes. We manufacture custom sizes, lengths, materials, coatings, and fastener configurations based on drawings, equipment specifications, and project requirements — with quick turnaround times for export orders.
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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