Technical Product Range
High-strength stud bolts and heavy hex nuts to ASTM A193, A320, and A194 for pressure equipment, valve and industrial applications.
Hex Bolts — A193 B7
Stud Bolts — A193 B7/B8
Stainless Fasteners — B8M
Alloy Steel Grades — B16/L7
Alloy Steel Stud Bolts
Sizes: M16 – M76 (5/8" – 3") · Finish options: 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 (HIC) |
| 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
Low-Temperature Stud Bolts
Sizes: M16 – M76 (5/8" – 3") · Finish options: 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
Heavy Hex Nuts
Sizes: M16 – M76 (5/8" – 3") · Finish options: Plain, Hot-Dip Galvanised
| Grade | Material | Temp Range |
|---|---|---|
| 2H | Carbon Steel (quenched & tempered) | 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
Automotive, Rail & Custom Manufacturing
Automotive Engine Bolts
IATF 16949 certified. Connecting rod bolts, head bolts, chassis fasteners to OEM drawing.
Rail Transit Structural Bolts
High-strength structural fasteners for high-speed rail and metro systems per TB/T standards.
Valve Body Stud Sets
Complete stud bolt + nut sets for gate, globe, ball and check valves. ASME B16.5 flange classes.
Custom Specifications
OEM/ODM to customer drawings. Material certs (MTR), hydro test records, NACE documentation available.
Need a specific grade or specification?
We supply complete flange bolt sets with material test reports (MTR), 3.1 certs and NACE documentation on request.
Request Technical Quote