CAT 5C7261 NUT for 345C Caterpillar Part - WSTPARTS
5C7261 NUT is a Bolt/Nut component engineered for Caterpillar 345C, C18 and 345B machines, built to match original factory specifications. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 3056: BASIC ENGINE, group 217-7605, page 117; 3126B: BASIC ENGINE, group 142-0369, page 136.
5C7261 NUT for Caterpillar 345C — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement NUT (Part # 5C7261). Designed for CAT 345C, C18, 345B, 3126B, 325C, 325D, 330C, 330D, 365B, 320C, 320D, 345D equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 345C, C18, 345B, 3126B, 325C, 325D, 330C, 330D, 365B, 320C, 320D, 345D
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT lines: New Genuine / Cat Reman / Cat Classic | OEM-equivalent direct replacements
- ✔ Available for order, contact for lead time
Specifications
| Part Number (MPN) | 5C7261 |
| Product Name | NUT |
| Brand | CAT |
| Applicable Models | 345C, C18, 345B, 3126B, 325C, 325D, 330C, 330D, 365B, 320C, 320D, 345D |
| Weight | 0.05 kg |
| Condition | New (Genuine CAT / OEM-equivalent direct replacement) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 5C7261 in the Caterpillar parts manual: the machine it is published under, the system it belongs to, the group number and the manual page. Use it to confirm the part against your own parts book before ordering.
| Machine | System | Group No. | Manual Page |
| 3056 | BASIC ENGINE | 217-7605 | p.117 |
| 3126B | BASIC ENGINE | 142-0369 | p.136 |
| 325C | BASIC ENGINE | 136-8888 | p.61 |
| 325D | BASIC ENGINE | 257-9145 | p.28 |
| 330C | BASIC ENGINE | 211-3285 | p.68 |
| 330D | BASIC ENGINE | 211-3285 | p.45 |
| 336D | BASIC ENGINE | 211-3285 | p.41 |
| 3412C | COOLING SYSTEM | 211-7508 | p.250 |
System Notes — BASIC ENGINE
The basic engine group covers the core structure and internals: cylinder block, cylinder head, pistons, rings, liners, connecting rods, crankshaft, bearings, camshaft and the gasket sets that seal them. These parts determine compression, oil pressure and power output. They wear gradually — rings lose tension, bearings show copper, liners glaze — and the first signs are usually blow-by from the breather, rising oil consumption, or a knock that gets louder as the engine warms. Replacing a basic engine part is a planned overhaul decision rather than a roadside fix, so matching the exact part number and serial number range matters more here than anywhere else on the machine.
System Notes — COOLING SYSTEM
The cooling system covers the radiator, water pump, thermostat, fan and fan drive, coolant hoses, clamps, the surge tank and the belts that drive it. It holds engine temperature inside the range where clearances and oil film stay correct. Failures are usually slow and then sudden: a hose softens and balloons before it bursts, a water pump seal starts weeping from the weep hole, a thermostat sticks partly open so the engine runs cold and burns more fuel. On construction sites the radiator also packs with dust and debris, which raises pressure across the core and finds the weakest hose or clamp first.
FAQ
Is 5C7261 the right part for my machine?
Match the part number on your old part, or send us your equipment serial number — WSTPARTS verifies fitment free of charge for CAT 345C.
Genuine CAT vs direct replacement — what is the difference?
Genuine CAT covers three factory lines: New Genuine, Cat Reman (core exchange with core charge) and Cat Classic (brand-new economy line). OEM-equivalent direct replacements are non-CAT parts; grade and warranty are confirmed in the quotation.
Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a warranty per quotation.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
