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Product Overview
The Carriage Bolt(Custom Non-standard) is engineered to meet unique project specifications, departing from standard DIN/ISO dimensions to address specialized fastening challenges. We offer full customization across head styles, neck designs, thread types, and materials.
Key Features
Fully customizable dimensions: non-standard head diameters, neck profiles, thread pitches, and lengths.
Flexible material options include alloy steel, stainless steel grades, and specialty coatings.
Precision manufacturing for consistent fit and performance in custom assemblies.
Available with modified drive types, partial threads, or special surface treatments.
Designed for one-off or low-volume production runs to match your exact requirements.
| SAE Grade 5.8 (Equivalent to ISO 5.8) | |
| Bolt Diameter | M5–M20 (Customizable) |
| Thread Type | UNC / UNF (Customizable; ISO metric thread for metric options) |
| Standards | DIN 603 / SAE J429 / ASTM A307 (Switchable per customer requirements) |
| Strength Grade | SAE Grade 5.8 |
| Heat Treatment | Quenched & Tempered (Q&T) |
| Tensile Strength | ≥500?MPa |
| Yield Strength | ≥400?MPa |
| Hardness | HRC 22–27 |
| Head Style | Mushroom head with square neck, Phillips recess |
| Thread Accuracy / Tolerance | 2A / 3A (Inch); 6g (Metric) |
| Operating Temperature | -40°C to 250°C |
| Matching Components | Hex nuts (DIN 934), Flat washers (DIN 125) |
| SAE Grade 8.8 (Equivalent to ISO 8.8) | |
| Bolt Diameter | M5–M20 (Customizable) |
| Thread Type | UNC / UNF (Customizable) |
| Standards | DIN 603 / SAE J429 / ASTM A325 |
| Strength Grade | SAE Grade 8.8 |
| Material | Medium carbon steel (C45 / SAE 1045) |
| Heat Treatment | Quenched & Tempered (Q&T) |
| Tensile Strength | ≥800?MPa |
| Yield Strength | ≥640?MPa |
| Hardness | HRC 24–33 |
| Head Style | Mushroom head with square neck, Phillips recess |
| Thread Accuracy / Tolerance | 2A / 3A |
| Operating Temperature | -40°C to 300°C |
| Matching Components | Hex nuts (DIN 934), Flat washers (DIN 125), Spring washers (DIN 127) |
| SAE Grade 10.9 (Equivalent to ISO 10.9) | |
| Bolt Diameter | M5–M20 (Customizable) |
| Thread Type | UNC / UNF (Customizable) |
| Standards | DIN 603 / SAE J429 / ASTM A490 |
| Strength Grade | SAE Grade 10.9 |
| Material | Alloy structural steel (40Cr / SAE 4140) |
| Heat Treatment | Quenched & Tempered (Q&T) |
| Tensile Strength | ≥1000?MPa |
| Yield Strength | ≥900?MPa |
| Hardness | HRC 32–39 |
| Head Style | Mushroom head with square neck, Phillips recess |
| Thread Accuracy / Tolerance | 2A / 3A |
| Operating Temperature | -40°C to 350°C |
| Matching Components | High-strength hex nuts (DIN 934, Class 10), Flat washers (DIN 125) |
| SAE Grade 12.9 (Equivalent to ISO 12.9) | |
| Bolt Diameter | M5–M20 (Customizable) |
| Thread Type | UNC / UNF (Customizable) |
| Standards | DIN 603 / SAE J429 / ASTM A490 |
| Strength Grade | SAE Grade 12.9 |
| Material | Alloy structural steel (35CrMo / SAE 4135) |
| Heat Treatment | Quenched & Tempered (Q&T) |
| Tensile Strength | ≥1200?MPa |
| Yield Strength | ≥1080?MPa |
| Hardness | HRC 39–44 |
| Head Style | Mushroom head with square neck, Phillips recess |
| Thread Accuracy / Tolerance | 2A / 3A |
| Operating Temperature | -40°C to 380°C |
| Matching Components | High-strength hex nuts (DIN 934, Class 12), Flat washers (DIN 125) |
Applications
Specialized machinery, custom woodworking, modular construction, industrial equipment retrofits, and unique structural projects where standard fasteners won’t suffice.
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