Technical Specifications
Technical data for industrial fasteners including strength classifications, torque specifications, and general product information.
Strength Classification
Imperial System
| Grade | Diameter | Tensile (min) | Yield (min) | Proof | Hardness |
|---|---|---|---|---|---|
| SAE Grade 9 | 1/4 - 1-1/8" | 170,000 PSI (1172 MPa) | 150,000 PSI (1034 MPa) | 136,000 PSI (938 MPa) | 36-42 HRC |
| Grade A9 | 1/4 - 1-1/2" | 180,000 PSI (1241 MPa) | 160,000 PSI (1103 MPa) | 144,000 PSI (993 MPa) | 39-43 HRC |
Metric System
| Class | Diameter | Tensile (min) | Yield (min) | Proof | Hardness |
|---|---|---|---|---|---|
| Class 10.9 | M10 - M33 | 1040 MPa (150,840 PSI) | 940 MPa (136,335 PSI) | 830 MPa (120,380 PSI) | 32-39 HRC |
| Class 12.9 | M10 - M33 | 1220 MPa (176,946 PSI) | 1100 MPa (159,542 PSI) | 970 MPa (140,687 PSI) | 39-44 HRC |
Tightening Torque Reference
Torque values are indicative only (±35% variance depending on joint conditions).
Based on nut factor 0.19 (blackened surface with light oil).
Target: 65% of proof load.
Imperial - Grade A9
| Diameter | 7/16" | 1/2" | 9/16" | 5/8" | 3/4" | 7/8" | 1" | 1-1/8" | 1-1/4" |
|---|---|---|---|---|---|---|---|---|---|
| UNC (lb.ft) | 70 | 107 | 154 | 212 | 376 | 605 | 907 | 1286 | 1812 |
| UNC (Nm) | 95 | 145 | 209 | 287 | 510 | 820 | 1230 | 1743 | 2457 |
| UNF (lb.ft) | 78 | 119 | 171 | 239 | 417 | 665 | 989 | 1435 | 1998 |
| UNF (Nm) | 105 | 162 | 231 | 324 | 566 | 901 | 1341 | 1945 | 2709 |
Metric Fine Thread - Class 10.9
| Size | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 |
|---|---|---|---|---|---|---|---|---|---|---|
| Nm | 113 | 178 | 275 | 388 | 556 | 750 | 946 | 1370 | 1912 | 2572 |
| lb.ft | 83 | 131 | 203 | 293 | 410 | 553 | 697 | 1011 | 1410 | 1897 |
Metric Fine Thread - Class 12.9
| Size | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 |
|---|---|---|---|---|---|---|---|---|---|---|
| Nm | 132 | 208 | 321 | 465 | 649 | 876 | 1105 | 1602 | 2234 | 3005 |
| lb.ft | 97 | 154 | 237 | 343 | 479 | 646 | 815 | 1181 | 1648 | 2217 |
Product Information
Track Bolts
- Material: 40Cr, 42CrMo alloy steel
- Process: Hot forging, thread rolling
- Grade: 8.8, 10.9, 12.9, A9
- Head: Hex with washer face
Plow Bolts
- Head styles: No.3, No.5, No.7
- Square neck for anti-rotation
- Countersunk for flush mounting
- Compatible with CAT, Komatsu, John Deere
Nuts
- Hex, flanged hex, heavy hex
- Heat treated to match bolt grades
Standards
- ISO, DIN, ASTM compliance
- Per-batch test reports
- Full material traceability
Documentation
- Material Test Reports (MTR) available
- Certificate of Conformance (CoC)
- Hardness and dimensional records
Shipping
- ISPM-15 compliant pallets
- Shrink-wrap with desiccants
- FOB Ningbo or CIF