API 5L Fasteners are high-strength carbon steel fastening components designed for use in oil & gas, pipeline, and structural applications. These fasteners are manufactured to meet the mechanical and chemical requirements of API 5L material grades, ensuring excellent load-bearing capacity, pressure resistance, and long-term durability in harsh operating environments.
API 5L fasteners include bolts, nuts, studs, threaded rods, washers, anchor bolts, and custom-engineered fastening solutions. They are widely used in onshore and offshore pipeline systems where strength, reliability, and corrosion resistance are critical.
API 5L fasteners are available in multiple grades to suit varying pressure and strength requirements. Commonly supplied grades include API 5L X42, X52, X56, X60, X65, X70, and X80, each offering specific mechanical performance suitable for different pipeline and structural applications.
Lower grades such as API 5L X42 and X52 are suitable for moderate-load applications, while API 5L X56 and X60 fasteners are used in medium to high-stress environments. High-strength grades such as API 5L X65, X70, and X80 are preferred for critical, high-pressure, and long-distance pipeline projects.
Revinox supplies API 5L fasteners in customized sizes, threading standards, and surface finishes to meet project-specific requirements. These fasteners provide a safe, reliable, and efficient fastening solution for demanding industrial applications worldwide.
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API 5L Fastener Grades
Application of API 5L Fasteners
| ● Oil & Gas Pipeline Projects |
| ● Petrochemical & Refinery Equipment |
| ● Onshore & Offshore Structures |
| ● Pipeline Flange & Joint Assemblies |
| ● Construction & Heavy Engineering |
Specification Table of API 5L Fasteners
| Specification | Details | |
|---|---|---|
|
Standard
|
API 5L (Fasteners manufactured from API 5L grade material) | |
|
Fastener Type
|
Bolts, Nuts, Stud Bolts, Screws, Threaded Rods, Washers | |
|
Size Range
|
M6 to M72 | 1/4″ to 3″ (Custom sizes available) | |
|
Thread Type
|
Metric, UNC, UNF, BSW, BSF, NPT | |
|
Grades
|
API 5L X42, API 5L X52, API 5L X56, API 5L X60, API 5L X65, API 5L X70, API 5L X80 | |
|
Surface Finish
|
Black, Zinc Plated, Hot Dip Galvanized, PTFE, Xylan, Phosphate | |
Delivery Condition
API 5L Fasteners are supplied in As Rolled, Normalized, Quenched & Tempered, or Heat Treated condition as per grade and application requirements.
API 5L Fastener Grades (Sub-Products)
| ● API 5L Grade B Fasteners – Low to medium pressure bolting applications |
| ● API 5L X42 Fasteners – Moderate strength structural fasteners |
| ● API 5L X52 Fasteners – Oil & gas pipeline bolting |
| ● API 5L X56 Fasteners – Medium to high pressure flange connections |
| ● API 5L X60 Fasteners – High pressure bolting systems |
| ● API 5L X65 Fasteners – Long distance pipeline fasteners |
| ● API 5L X70 Fasteners – High strength structural fasteners |
| ● API 5L X80 Fasteners – Critical & high load applications |
Process of Manufacturing – API 5L Fasteners
| Fastener Type | PSL 1 | PSL 2 |
|---|---|---|
| Bolts | ✔ | ✔ |
| Nuts | ✔ | ✔ |
| Stud Bolts | ✔ | ✔ |
| Threaded Rods | ✔ | ✔ |
| Washers | ✔ | ✔ |
| Manufacturing includes Hot Forging / Cold Forging, Heat Treatment, Quenching & Tempering, Thread Rolling or Cutting, Surface Coating, and Final Inspection as per API requirements. | ||
Chemical Composition Table – API 5L Fasteners (PSL 1)
| Fastener Grade | C max | Mn max | P max | S max | Nb + V + Ti max |
|---|---|---|---|---|---|
| API 5L Grade B Fasteners | 0.28 | 1.20 | 0.030 | 0.030 | 0.15 |
| API 5L X42 / X52 Fasteners | 0.28 | 1.40 | 0.030 | 0.030 | 0.15 |
| API 5L X56 – X70 Fasteners | 0.28 | 1.40 | 0.030 | 0.030 | 0.15 |
Chemical Composition Table – API 5L Fasteners (PSL 2)
| Fastener Grade | C max | Mn max | P max | S max | CE (Max) |
|---|---|---|---|---|---|
| API 5L X42 / X52 Fasteners | 0.24 | 1.40 | 0.025 | 0.015 | 0.43 |
| API 5L X56 / X60 Fasteners | 0.22 | 1.50 | 0.025 | 0.015 | 0.43 |
| API 5L X65 / X70 / X80 Fasteners | 0.20 | 1.60 | 0.025 | 0.015 | 0.45 |
Mechanical Properties – API 5L Fasteners
| Fastener Grade | Yield Strength (PSI Min) | Tensile Strength (PSI Min) | Elongation Min % |
|---|---|---|---|
| API 5L Grade B Fasteners | 35,000 | 60,000 | 22 |
| API 5L X42 Fasteners | 42,000 | 60,000 | 21 |
| API 5L X52 Fasteners | 52,000 | 66,000 | 21 |
| API 5L X56 Fasteners | 56,600 | 71,100 | 20 |
| API 5L X60 Fasteners | 60,200 | 75,400 | 20 |
| API 5L X65 Fasteners | 65,300 | 77,000 | 19 |
| API 5L X70 Fasteners | 70,300 | 82,000 | 18 |
| API 5L X80 Fasteners | 80,000 | 90,000 | 18 |
API 5L Fasteners – Tensile and Yield Properties (PSL 1 & PSL 2)
API 5L fasteners are widely used in oil & gas, petrochemical, power, and structural applications where high strength, pressure resistance, and mechanical reliability are required. These fasteners are manufactured in PSL 1 and PSL 2 specifications to deliver excellent yield strength, tensile strength, and elongation performance.
API 5L Fastener Grades Offered:
- API 5L Grade B Fasteners
- API 5L X42 Fasteners
- API 5L X52 Fasteners
- API 5L X56 Fasteners
- API 5L X60 Fasteners
- API 5L X65 Fasteners
- API 5L X70 Fasteners
- API 5L X80 Fasteners
| Fastener Grade | Tensile Properties – API 5L Fasteners (PSL 2) | ||||
|---|---|---|---|---|---|
| Yield Strength (PSI) | Tensile Strength (PSI) |
Yield / Tensile Ratio Maximum |
|||
| Minimum | Maximum | Minimum | Maximum | ||
| X56N / X56Q / X56M Fasteners | 56,600 | 79,000 | 71,100 | 110,200 | 0.93 |