Repsol Steel LLP is a trusted hex bolt supplier for buyers across the USA, Europe, Africa, Mexico, and Oman. We supply a comprehensive range of hex bolts — including SS316, SS304, ASTM A193 B7, B7M, B16, ASTM A325, A490, and Grade 8.8, 10.9, 12.9 hex bolts — engineered for high-strength bolting in structural, Oil & Gas, petrochemical, refinery, power generation, and industrial 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 hex bolt we supply complies with ASTM A193, ASTM A194, ASTM A320, ASTM A325, ASTM A490, ASME B18.2.1, and ISO 898-1 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 hex bolts for a petrochemical plant in Europe, B7 hex bolts for a refinery in the USA, or Grade 8.8 hex bolts for a structural project in Africa or Oman — Repsol Steel LLP delivers the right hex bolt solution, on time, with complete export documentation.
A complete hex bolt portfolio covering SS316, SS304, B7, B7M, B16, A325, A490, and Grade 8.8, 10.9, 12.9 — engineered for high-strength bolting across global markets.
The most widely specified stainless steel hex bolts for corrosive and high-temperature service. SS316 hex bolts provide superior corrosion resistance to chlorides and marine environments.
Compliance: ASME B18.2.1, ASTM A193
Applications: Petrochemical, refinery, chemical processing
Size Range: ½" to 4"
Cost-effective stainless steel hex bolts for general industrial applications. SS304 hex bolts provide good corrosion resistance and reliable performance in moderate service conditions.
Compliance: ASME B18.2.1
Applications: General industry, utilities, process piping
Size Range: ½" to 4"
The most widely specified alloy steel hex bolts for high-pressure and high-temperature flanged joints. B7 hex bolts are used in refinery, petrochemical, and power generation applications.
Compliance: ASTM A193 B7, ASME B18.2.1
Nut Pairing: ASTM A194 2H
Size Range: ½" to 4"
B7M hex bolts are NACE-compliant for sour service (H2S). B16 hex bolts are creep-resistant for high-temperature service. Both are available with matched 2HM or 4/7 nuts.
Compliance: ASTM A193 B7M, B16, NACE MR0175
Nut Pairing: ASTM A194 2HM or 4/7
Size Range: ½" to 4"
High-strength structural hex bolts for steel-to-steel connections in bridges, buildings, and industrial structures. Available in A325, A490, and F3125 grades.
Compliance: ASTM A325, A490, F3125
Tensile Strength: 120 ksi to 150 ksi
Size Range: ½" to 1½"
High tensile hex bolts for structural, automotive, and heavy machinery applications. Available in Grade 8.8, 10.9, and 12.9 with superior tensile strength.
Compliance: ISO 898-1, DIN 931, DIN 933
Tensile Strength: 800 MPa to 1200 MPa
Size Range: M6 to M100
Hex bolts are supplied in different materials and grades to suit specific pressure, temperature, and application requirements. The material grade determines the mechanical strength, corrosion resistance, and temperature capability of the hex bolt. We supply hex bolts in the following materials and grades:
All hex bolts 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 |
|---|---|
| Hex Bolt Types | Hex Head Bolts (Full Thread), Hex Head Bolts (Partial Thread), Heavy Hex Bolts |
| Materials | Stainless Steel (SS304, SS316, SS321), Carbon Steel, Alloy Steel (B7, B7M, B16, L7, L7M), High Tensile (8.8, 10.9, 12.9), Exotic Alloys (Monel, Inconel, Hastelloy, Duplex) |
| Hex Bolt Grades | ASTM A193 B7, B7M, B16; ASTM A320 L7, L7M; ASTM A325, A490, F3125; ISO 898-1 Grade 8.8, 10.9, 12.9; SS304, SS316, SS321 |
| Size Range (Imperial) | ¼" to 4" standard; larger sizes available on request |
| Size Range (Metric) | M6 to M100 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 and ISO 261 |
| Coatings | Plain, Zinc Plated, Hot-Dip Galvanized, Xylan, PTFE, Cadmium, Dacromet, Geomet |
| Standards Compliance | ASTM A193, A194, A320, A325, A490, F3125, A307; ASME B18.2.1; ISO 898-1; DIN 931, 933 |
| 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 hex bolt selection is critical to ensuring a leak-free flanged joint, reliable structural connection, and long-term operational safety. The grade, material, and coating must be matched to the operating pressure, temperature, and application. Our technical team recommends evaluating four key factors before finalizing a hex bolt:
If you are unsure which hex bolt specification best suits your application, our technical team is available to review your flange drawings, structural requirements, and project specifications — and recommend the most suitable hex bolt solution.
We specialize in hex bolt supply — offering SS316, SS304, B7, B7M, B16, A325, A490, and Grade 8.8, 10.9, 12.9 hex bolts. Every hex bolt is manufactured to ASTM, ASME, and ISO standards.
We supply hex bolts in all major grades — ASTM A193 B7, B7M, B16; ASTM A320 L7, L7M; ASTM A325, A490, F3125; ISO 898-1 Grade 8.8, 10.9, 12.9; and SS304, SS316, SS321 — from ¼" to 4" as standard.
Every hex bolt batch is backed by Material Test Certificates (MTC) and mechanical test reports, and can be supplied with NACE compliance documentation, dimensional inspection reports, and third-party certification on request.
Non-standard sizes, grades, lengths, and hex bolt configurations are manufactured according to drawings, equipment specifications, and project requirements — with quick turnaround times.
We supply hex bolts 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 hex bolt selection, grade recommendations, and installation guidance. Post-supply support includes documentation follow-up and replacement coordination.
Repsol Steel LLP supplies hex bolts to a wide range of process industries across USA, Europe, Africa, Mexico, and Oman — where reliable bolting performance is essential for safety and operational reliability.
Hex bolts 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.
High-strength structural hex bolts supplied for steel-to-steel connections in bridges, buildings, industrial structures, and infrastructure projects.
High-temperature hex bolts supplied for boilers, steam systems, turbine connections, and high-pressure auxiliary piping in thermal and nuclear power plants.
SS316 and exotic alloy hex bolts supplied for aggressive chemical and corrosive media applications in reactors, storage tanks, and process equipment.
Hex bolts supplied to fabrication units and EPC contractors for piping spools, skids, modular structures, and industrial assemblies.
Repsol Steel LLP is recognized as a reliable hex bolt 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 hex bolts arrive on time, in specification, and ready for installation.
USA: Hex bolt supply for Oil & Gas, petrochemical & structural projects
Europe: Hex bolts for chemical, refinery & construction industries
Africa: Hex bolts for refinery, infrastructure & power projects
Mexico: Hex bolt supply for chemical plants, refinery & automotive projects
Oman: Hex bolts for Oil & Gas, construction & power projects
All hex bolts are supplied with material certificates, mechanical test reports, and third-party certification as required by project specifications.
A hex bolt is a threaded fastener with a hexagonal head, designed to be tightened or loosened with a wrench or spanner. Hex bolts are used in flanged joints, structural connections, and general industrial fastening applications.
We supply hex bolts in ASTM A193 B7, B7M, B16; ASTM A320 L7, L7M; ASTM A325, A490, F3125; ISO 898-1 Grade 8.8, 10.9, 12.9; and SS304, SS316, SS321 grades. Exotic alloys including Monel, Inconel, Hastelloy, and Duplex are also available.
A hex bolt has a hexagonal head and is tightened from one side with a nut on the other side. A stud bolt has no head and is threaded on both ends, requiring nuts on both sides. Hex bolts are used for general fastening; stud bolts are preferred for flanged joints with through-holes.
We supply hex bolts primarily to the USA, Europe, Africa, Mexico, and Oman, serving Oil & Gas, petrochemical, structural, power, subsea, and chemical processing projects in these regions.
Yes. We offer custom sizes, grades, lengths, and hex bolt configurations based on drawings, equipment specifications, and project requirements — with quick turnaround times for export orders.
Send us your hex 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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