Repsol Steel LLP is a leading stainless steel fasteners manufacturer supplying high-integrity bolting products to buyers across the USA, Europe, Africa, Mexico, and Oman. We manufacture SS304, SS316, SS321, SS347, SS904L, Duplex, and Super Duplex bolts, nuts, studs, and washers — engineered for corrosion resistance and reliable bolting performance 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 stainless steel fastener production — including forging, threading, heat treatment, surface finishing, and testing operations. Every stainless steel 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, mechanical test reports, 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, SS304 nuts for a refinery in the USA, or SS321 studs for a high-temperature application in Africa or Oman — Repsol Steel LLP manufactures the right stainless steel fastening solution, on time, with complete export documentation.
A complete stainless steel fasteners manufacturing portfolio covering SS304, SS316, SS321, SS347, SS904L, Duplex, and Super Duplex bolts, nuts, studs, and washers — manufactured for corrosion resistance and reliable bolting performance across global markets.
The most widely specified stainless steel fasteners for corrosive and high-temperature service. Manufactured with SS316 for superior corrosion resistance to chlorides and marine environments.
Compliance: ASME B18.2.1, ASME B18.2.2, ASTM A193
Applications: Petrochemical, refinery, chemical processing
Size Range: ½" to 4"
Cost-effective stainless steel fasteners manufactured for general industrial applications. SS304 provides good corrosion resistance and reliable performance in moderate service conditions.
Compliance: ASME B18.2.1, ASME B18.2.2
Applications: General industry, utilities, process piping
Size Range: ½" to 4"
High-temperature stainless steel fasteners manufactured for elevated service conditions. SS321 provides superior thermal stability and oxidation resistance at high temperatures.
Compliance: ASTM A193, ASTM A194
Applications: Refinery, power generation, high-temperature piping
Size Range: ½" to 4"
Low-carbon version of SS316 manufactured for welded applications. SS316L fasteners provide excellent corrosion resistance and are ideal for chemical and pharmaceutical service.
Compliance: ASME B18.2.1, ASME B18.2.2
Applications: Chemical, pharmaceutical, food processing
Size Range: ½" to 4"
Niobium-stabilized stainless steel fasteners manufactured for high-temperature and high-pressure service. SS347 offers excellent resistance to intergranular corrosion.
Compliance: ASTM A193, ASTM A194
Applications: Nuclear, high-temperature refinery, power plants
Size Range: ½" to 4"
High-strength stainless steel fasteners manufactured for highly corrosive and high-pressure service. Duplex fasteners offer superior resistance to stress corrosion cracking.
Compliance: ASTM A182, NORSOK
Applications: Subsea, offshore, chemical processing
Size Range: ½" to 4"
As a specialist stainless steel fasteners manufacturer, we follow a structured manufacturing process that ensures dimensional accuracy, material integrity, and consistent mechanical properties in every stainless steel 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 stainless steel fasteners that perform reliably in the most demanding industrial environments — from high-pressure Oil & Gas wellheads to high-temperature refinery and petrochemical operations. Every stainless steel 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.
Stainless steel fasteners are manufactured in different grades to suit specific pressure, temperature, and media conditions. The grade of stainless steel determines the corrosion resistance, mechanical strength, and temperature capability of the fastener. We manufacture stainless steel fasteners in the following grades:
All stainless steel 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.
| Parameter | Specification |
|---|---|
| Fastener Types | Hex Bolts, Hex Nuts, Stud Bolts, Washers, Custom Fasteners |
| Stainless Steel Grades | SS304/304L, SS316/316L, SS321, SS347, SS904L, Duplex 2205, Super Duplex 2507 |
| 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 |
| Surface Finish | Plain, Passivated (stainless steel fasteners typically supplied plain or passivated) |
| Standards Compliance | ASTM A193, ASTM A194, ASTM A320, ASME B18.2.1, ASME B18.2.2, ASME B18.31.2, EN 10204 |
| 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 stainless steel fastener selection is critical to ensuring a leak-free flanged joint and long-term operational safety. The grade, fastener type, and thread must be matched to the operating pressure, temperature, and media. Our technical team recommends evaluating four key factors before finalizing a stainless steel fastener:
If you are unsure which stainless steel 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 stainless steel fastening solution.
We specialize in stainless steel fastener manufacturing — offering SS304, SS316, SS321, SS347, SS904L, Duplex, and Super Duplex grades in hex bolts, stud bolts, nuts, and washers. Every fastener is manufactured to ASTM and ASME standards.
Our manufacturing unit is equipped for high-precision stainless steel fastener production — covering forging, threading, heat treatment, surface finishing, and testing operations. This allows us to control quality at every stage of production.
Every stainless steel fastener batch is backed by Material Test Certificates (MTC to EN 10204 3.1) confirming the exact grade, and can be supplied with mechanical test reports, dimensional inspection reports, and third-party certification on request.
Non-standard sizes, grades, and stainless steel fastener configurations are manufactured according to flange drawings, equipment specifications, and project requirements — with quick turnaround times.
We manufacture and export stainless steel 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 stainless steel grade selection, fastener type recommendations, and installation guidance. Post-supply support includes documentation follow-up and replacement coordination.
Repsol Steel LLP manufactures stainless steel fasteners for a wide range of process industries across USA, Europe, Africa, Mexico, and Oman — where corrosion resistance and high-temperature bolting performance are essential.
Stainless steel 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.
SS321 and SS347 fasteners manufactured for high-temperature and high-pressure flanged joints in crude distillation, catalytic cracking, and hydroprocessing units.
High-temperature stainless steel fasteners manufactured for boilers, steam systems, turbine connections, and high-pressure auxiliary piping in thermal and nuclear power plants.
SS316 and SS904L fasteners manufactured for aggressive chemical and corrosive media applications in reactors, storage tanks, and process equipment.
Duplex and Super Duplex fasteners manufactured for subsea wellhead equipment, manifolds, and flowlines per API 17D — with superior resistance to seawater and chloride stress corrosion.
Repsol Steel LLP is recognized as a reliable stainless steel fasteners 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 stainless steel fasteners arrive on time, in specification, and ready for installation.
USA: Stainless steel fastener manufacturing for Oil & Gas, petrochemical & power projects
Europe: Stainless steel fasteners for chemical, refinery & process industries
Africa: Stainless steel fasteners for refinery, petrochemical & subsea projects
Mexico: Stainless steel fastener manufacturing for chemical plants & refinery operations
Oman: Stainless steel fasteners for Oil & Gas, petrochemical & power projects
All stainless steel fasteners are manufactured and exported with Material Test Certificates (MTC to EN 10204 3.1), 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 stainless steel fasteners in SS304/304L, SS316/316L, SS321, SS347, SS904L, Duplex 2205, and Super Duplex 2507 grades — selected based on operating pressure, temperature, and media compatibility.
We manufacture stainless steel hex bolts, hex nuts, stud bolts, washers, and custom fasteners — in various grades, sizes, and thread types per project specifications.
We manufacture and export stainless steel fasteners primarily to the USA, Europe, Africa, Mexico, and Oman, serving Oil & Gas, petrochemical, subsea, refinery, power, and chemical processing projects in these regions.
Yes. We manufacture custom sizes, grades, lengths, and stainless steel 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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