Repsol Steel LLP is a trusted stainless steel fasteners supplier for buyers across the USA, Europe, Africa, Mexico, and Oman. We supply a comprehensive range of stainless steel fasteners — including SS304, SS316, and SS321 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 and a proven export network, we serve EPC contractors, procurement teams, maintenance engineers, and fabrication units worldwide. Every stainless steel fastener we supply 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 delivers the right stainless steel fastening solution, on time, with complete export documentation.
A complete stainless steel fasteners portfolio covering SS304, SS316, and SS321 bolts, nuts, studs, and washers — engineered for corrosion resistance and reliable bolting performance across global markets.
The most widely specified stainless steel fasteners for corrosive and high-temperature service. SS316 provides 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 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 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 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 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 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"
Stainless steel fasteners are supplied 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 supply stainless steel fasteners in the following grades:
All stainless steel fasteners we supply 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 available per project specifications |
| Thread Types | UNC, UNF, BSW, Metric (M) — per ASME B1.1 |
| Coatings | Plain, Xylan, PTFE (stainless steel fasteners typically supplied plain) |
| 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 supply — 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.
We supply stainless steel fasteners in all major grades — SS304/304L, SS316/316L, SS321, SS347, SS904L, Duplex 2205, and Super Duplex 2507 — from ½" to 4" as standard, with larger sizes and custom configurations on request.
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 supply 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 supplies stainless steel fasteners to 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 supplied for wellhead equipment, Christmas trees, pipeline flanges, and high-pressure process piping in upstream, midstream, and downstream operations.
Bolting solutions supplied for reactors, heat exchangers, process piping, and storage systems handling hydrocarbons at high pressures and temperatures.
SS321 and SS347 fasteners supplied for high-temperature and high-pressure flanged joints in crude distillation, catalytic cracking, and hydroprocessing units.
High-temperature stainless steel fasteners supplied for boilers, steam systems, turbine connections, and high-pressure auxiliary piping in thermal and nuclear power plants.
SS316 and SS904L fasteners supplied for aggressive chemical and corrosive media applications in reactors, storage tanks, and process equipment.
Duplex and Super Duplex fasteners supplied 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 supplier for international 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 USA, Europe, Africa, Mexico, and Oman — ensuring your stainless steel fasteners arrive on time, in specification, and ready for installation.
USA: Stainless steel fastener supply 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 supply for chemical plants & refinery operations
Oman: Stainless steel fasteners for Oil & Gas, petrochemical & power projects
All stainless steel fasteners are supplied with Material Test Certificates (MTC to EN 10204 3.1), mechanical test reports, and third-party certification as required by project specifications.
Stainless steel fasteners are bolting components (bolts, nuts, studs, washers) manufactured from stainless steel grades such as SS304, SS316, SS321, SS347, and SS904L. They are used for corrosion resistance and high-temperature bolting in flanged joints across industrial applications.
We supply 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 supply stainless steel hex bolts, hex nuts, stud bolts, washers, and custom fasteners — in various grades, sizes, and thread types per project specifications.
We supply 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 offer 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.
Repsol Steels LLP Team Is Here to Help
Looking for reliable pipes, fittings, flanges, valves or other industrial piping products? Share your requirement and our team will help you find the right product, material and specification.