Genuine Caterpillar 245-9750 (2459750) Taperlock Stud — a 50 mm long, fully threaded metric tapered stud with an M10 x 1.50 coarse thread and a taper-lock thread form on the installed end. The taper-lock thread pulls tight as the stud is driven into the tapped hole, locking it in place and resisting loosening from vibration, heat cycling and thermal expansion. Caterpillar catalogues this part under Hardware, Seals & Consumables / Hardware / Fasteners / Studs as a 50mm Length Tapered Stud.
In heavy-duty diesel engine service this stud is widely identified as a turbocharger mounting stud that secures the turbocharger to the exhaust manifold on Caterpillar 3176, C10, C11, C12 and C13 series engines. It is also used as a general-purpose Cat fastener across a broad range of Cat engines and machines. Cat studs are designed to work as a system with matching hardened washers and nuts to produce consistent clamp load.
Application data above reflects Caterpillar compatible-model listings and heavy-duty distributor application notes for this part number. Verify against your machine or engine serial number before purchase.
Verified Direct Replacement — Same Part, Alternate Number Formats
Related / Interchangeable Cat Taperlock Stud Numbers (distributor-listed OEM references)
Aftermarket Equivalent
Supersession: Not Available
User-Provided / Unverified: Not Available
| Product Type | Taperlock stud / tapered stud (turbocharger mounting stud) |
| Stud Type | Taper Lock |
| Thread Size (dia x pitch) | M10 x 1.50 |
| Thread Diameter | M10 |
| Thread Pitch | 1.50 mm |
| Thread Series | Metric coarse thread |
| Threading | Fully threaded |
| Overall Length | 50 mm (approx. 1.97 in) |
| Screw Length — A | 50 mm |
| Unit of Measurement | Metric |
| Coating / Finish | Plain finish |
| Grade | Plain finish (Cat catalogue attribute) |
| Locking Feature | Taperlock / interference thread form per Cat stud dimensional standard (metric thread sizes M5 through M64) |
| Material | Not Available — distributor listings conflict (steel, stainless steel, and Inconel 718 Ni-Cr high-temperature superalloy are each published by different sellers) |
| Standards | Cat fasteners stated to meet or exceed ISO, ASTM, ASME and SAE requirements; RoHS-compliant coatings |
| Property Class / Tensile Strength | Not Available |
| Installation Torque | Not Available |
| Operating Temperature Range | Not Available |
| Unit Weight | Approx. 0.22 lb (0.10 kg) per stud per distributor shipping data |
| Prop 65 Notice | This product can expose you to lead and lead compounds, known to the State of California to cause cancer and birth defects or other reproductive harm |
| Manufacturer | Caterpillar Inc. (Cat) |
| Manufacturer Part Number | 245-9750 |
| MPN (unhyphenated) | 2459750 |
| Calfrac SKU | 2459750 |
| Cat Part Description | 50mm Length Tapered Stud / STUD-TAPERLOCK / STUD-TAPER |
| VMRS Code | 043-004-014 |
| VMRS Description | STUD — MOUNTING, TURBOCHARGER (System 043 Exhaust System, Assembly 004 Turbocharger Assembly), applicable to the turbocharger-mounting use of this stud |
| UPC / GTIN | Not Available |
| OEM Numbers | Caterpillar 245-9750, 2459750 |
| Alternate / Related Numbers | 8T-4133, 8T-4137, 9B-7237, 227-6715, 231-0336, 242-0991, 259-7140, 279-2314, 281-2592, PAI 340117, M-2459750 |
| Superseded Numbers | Not Available |
| Country of Origin | United States (as published by multiple sellers of the genuine Cat part) |
| Cat Catalogue Path | Hardware, Seals & Consumables / Hardware / Fasteners / Studs |
Please compare part numbers carefully and independently verify fitment before purchasing. Confirm the thread size and pitch (M10 x 1.50), the 50 mm overall length, the taper-lock thread form, and the stud length required by your mounting flange. Because this stud is used across many Cat engines and machines, verify the application against your machine serial number or engine serial number (ESN), your Cat parts manual, or your Cat dealer. If you need additional dimensions, thread details, or photos before buying, please contact us.
Please note that packaging condition may vary due to warehouse storage, handling, age, or inventory consolidation. Original manufacturer’s packaging may show signs of wear such as scuffs, tears, labels, markings, tape residue, dust, or discoloration. In some cases, items may be repackaged for storage or shipping purposes.
While the external packaging may not be in perfect condition, the part itself remains new and unused unless otherwise stated in the listing. Customers should review all listing photos carefully, as the item shown is representative of the actual product being sold. If you have any questions regarding item condition, packaging, compatibility, or specifications, please contact us prior to purchase.