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Product Overview
Metric Grade 8.8 threaded rods are high-strength carbon steel fasteners manufactured to ISO 898-1 and EN 14399 standards. These rods are fully threaded along their length, providing versatile fastening solutions for structural, mechanical, and general engineering applications. Grade 8.8 designates a medium carbon steel that is quenched and tempered to achieve a minimum tensile strength of 800 MPa and a yield strength of 640 MPa, making them suitable for demanding bolted connections.
Metric Grade 8.8 threaded rods are widely specified for steel construction, machinery assembly, and anchor bolt systems where reliable clamping force and consistent mechanical properties are critical. They are available in plain, zinc-plated, hot-dip galvanized, and other protective finishes to suit various environments.
| Material | Carbon Steel, Grade 8.8 |
| Standard | ISO 898-1 / EN 14399 |
| Thread Standard | ISO Metric (DIN 13-1) |
| Diameter Range | M6-M64 |
| Length Range | 100 mm - 6000 mm |
| Tensile Strength | 800 MPa min |
| Yield Strength | 640 MPa min |
| Hardness | Max 255 HB |
| Finish | Plain, Zinc Plated, HDG |
Complete the Fastener Set
Technical Data
| Size (M) | Pitch (mm) | Core Dia (mm) | Length Range (mm) |
|---|---|---|---|
| M6 | 1.0 | 4.8 | 100-2000 |
| M8 | 1.25 | 6.6 | 100-3000 |
| M10 | 1.5 | 8.2 | 100-3000 |
| M12 | 1.75 | 10.1 | 100-3000 |
| M16 | 2.0 | 13.6 | 100-4000 |
| M20 | 2.5 | 17.0 | 100-6000 |
| M24 | 3.0 | 20.4 | 100-6000 |
| M30 | 3.5 | 26.4 | 100-6000 |
| M36 | 4.0 | 32.4 | 100-6000 |
| M42 | 4.5 | 38.4 | 100-6000 |
| M48 | 5.0 | 44.4 | 100-6000 |
| M56 | 5.5 | 52.2 | 100-6000 |
| M64 | 6.0 | 58.2 | 100-6000 |
| Standard | Covers | Thread |
|---|---|---|
| DIN 976-1 | Fully threaded rods | Metric |
| ISO 898-1 | Mechanical properties | Metric |
| EN 14399-4 | Structural bolting assemblies | Metric |
| ASME B18.31.3 | Threaded rods (inch) | UNC/UNF |
| Material Standard | Requirement |
|---|---|
| ISO 898-1 | Grade 8.8 mechanical |
| EN 10204 3.1 | Mill test certificate |
| EN 10204 3.2 | TPI-witnessed MTC |
| ISO 4042 | Coating/finish |
Material Chemistry
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.25-0.55 |
| Manganese (Mn) | 0.50-1.65 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.035 max |
| Silicon (Si) | 0.15-0.35 |
| Chromium (Cr) | 0.30 max |
| Nickel (Ni) | 0.30 max |
| Boron (B) | 0.003 max |
Fastener Performance
| Rod Size | Dry (Nm) | Lubricated (Nm) | Clamp Load (kN) |
|---|---|---|---|
| M12 | 90 | 72 | 45 |
| M16 | 220 | 176 | 90 |
| M20 | 430 | 344 | 140 |
| M24 | 750 | 600 | 205 |
| M30 | 1500 | 1200 | 320 |
| M36 | 2600 | 2080 | 465 |
| M42 | 4100 | 3280 | 650 |
| M48 | 6100 | 4880 | 850 |
Industry Applications
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