Technical Product Range
High-strength stud bolts and heavy hex nuts to ASTM A193, A320 and A194 for pressure equipment, valves and critical industrial applications.
Full Product Range
Three certified grades for pressure equipment, plus specialty manufacturing for automotive, rail and custom applications.
Alloy & Stainless Stud Bolts
Sizes: M16 – M76 (5/8" – 3")
Finish: Plain · Hot-Dip Galvanised · PTFE/Xylan Coated
| Grade | Material | Temp Range |
|---|---|---|
| B7 | Cr-Mo Alloy (4140/4142) | Up to 427°C / 800°F |
| B7M | Cr-Mo Alloy (modified) | Low-alloy, sour service |
| B16 | Cr-Mo-V Alloy | Up to 540°C / 1000°F |
| B8 | AISI 304 Stainless | Cryogenic to +538°C |
| B8M | AISI 316 Stainless | Cryogenic to +538°C |
Typical Applications
- ›High-temperature flanges
- ›Pressure vessels
- ›Industrial valves
- ›Heat exchangers
- ›Reactor piping systems
Documentation
- ✓EN 10204 3.1 Mill Certs
- ✓NACE MR0175/MR0103
- ✓PED Conformity Declaration
Low-Temperature Stud Bolts
Sizes: M16 – M76 (5/8" – 3")
Finish: Plain · Mechanically Galvanised
| Grade | Material | Temp Range |
|---|---|---|
| L7 | Cr-Mo Alloy (4140) | Down to −101°C / −150°F |
| L7M | Cr-Mo Alloy (modified) | Down to −101°C / −150°F |
| B8 | AISI 304 Stainless | Down to −196°C / −320°F |
| B8M | AISI 316 Stainless | Down to −196°C / −320°F |
Typical Applications
- ›LNG / cryogenic equipment
- ›Low-temperature pressure vessels
- ›Offshore platforms
- ›Cold-service valves
- ›Sub-sea pipelines
Documentation
- ✓EN 10204 3.1 Mill Certs
- ✓Charpy Impact Reports
- ✓PED Conformity Declaration
Heavy Hex Nuts
Sizes: M16 – M76 (5/8" – 3")
Finish: Plain · Hot-Dip Galvanised
| Grade | Material | Temp Range |
|---|---|---|
| 2H | Carbon Steel (Q&T) | General high-pressure service |
| 2HM | Low-alloy (modified) | Sour service (H₂S environments) |
| 7 | Cr-Mo Alloy | High-temperature service |
| 7M | Cr-Mo Alloy (modified) | High-temp sour service |
| 8 | AISI 304 Stainless | Corrosion-resistant service |
| 8M | AISI 316 Stainless | High-chloride service |
Typical Applications
- ›Flanged pipe connections
- ›Pressure vessel closures
- ›Valve bonnets
- ›Structural bolting
- ›Offshore & subsea
Documentation
- ✓EN 10204 3.1 Mill Certs
- ✓Dimensional Inspection Report
- ✓PED Conformity Declaration
Precision Manufacturing
Automotive, rail transit and custom OEM parts manufactured to drawing with IATF 16949 quality processes.
Automotive Engine & Chassis Bolts
Connecting rod bolts, cylinder head bolts, wheel hub bolts and chassis structural fasteners manufactured to OEM drawing. Hot/cold heading, heat treatment and surface treatment all in-house.
- ·Grade 8.8 / 10.9 / 12.9
- ·M6 – M36 diameter range
- ·±0.01 mm CNC tolerances
- ·Tensile & fatigue testing on-site
Rail Transit Structural Fasteners
High-strength structural fasteners for high-speed rail (CRH/CRRC), urban metro systems and bridge structures. Manufactured to TB/T and EN 14399 standards with full dimensional and mechanical traceability.
- ·High-strength F10T / S10T grades
- ·Tension-control bolt assemblies
- ·Hot-dip galvanised or fluoropolymer coated
- ·Full dimensional inspection records
Valve Flange Stud Sets
Complete bolt + nut sets for gate, globe, ball and check valves. Supplied as pre-assembled matched sets to ASME B16.5 pressure classes 150–2500#, with traceability to each heat of material.
- ·ASME 150# – 2500# flange classes
- ·Matched B7/2H or B8M/8M sets
- ·PED-compliant sets available
- ·Colour-coded grade identification
Custom Non-Standard Parts
Manufactured to your CAD/PDF for any geometry, any special alloy. Duplex, Super-Duplex, Incoloy 825, Hastelloy C276, Inconel 625, Titanium Grade 2/5. EN 10204 3.2 certification available.
- ·Special alloys & exotic materials
- ·EN 10204 3.1 / 3.2 certs
- ·NACE MR0175 compliance
- ·Heat-batch traceability
Need a specific grade, size or certification?
We supply complete flange bolt sets with mill certificates (MTR), EN 10204 3.1/3.2 reports and PED declarations on request.
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