CAT 3N1645 SCREW for 3306 Caterpillar Part - WSTPARTS
3N1645 SCREW is a Bolt/Nut component engineered for Caterpillar 3306, 3516 and 3412C machines, built to match original factory specifications. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 3412C: GENERATORS, group 153-3088, page 836; 3512C: ELECTRICAL AND STARTING SYSTEM, group 154-3477, page 349.
3N1645 SCREW for Caterpillar 3306 — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement SCREW (Part # 3N1645). Designed for CAT 3306, 3516, 3412C, 3512C equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 3306, 3516, 3412C, 3512C
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT parts with anti-counterfeit label | OEM alternatives with warranty
- ✔ Available for order, contact for lead time
Specifications
| Part Number (MPN) | 3N1645 |
| Product Name | SCREW |
| Brand | CAT |
| Applicable Models | 3306, 3516, 3412C, 3512C |
| Weight | 0.05 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 3N1645 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 |
| 3412C | GENERATORS | 153-3088 | p.836 |
| 3512C | ELECTRICAL AND STARTING SYSTEM | 154-3477 | p.349 |
| 3516 | AIR INLET AND EXHAUST SYSTEM | 148-6858 | p.321 |
| 3306 | GENERATORS | 110-3410 | p.1673 |
| 3512C | ELECTRICAL AND STARTING SYSTEM | 154-3478 | p.350 |
| 3306 | GENERATORS | 110-3410 | p.1675 |
| 3512C | SERVICE EQUIPMENT AND SUPPLIES | 121-9272 | p.446 |
| 3306 | GENERATORS | 110-3410 | p.1677 |
System Notes — GENERATORS
The generators group covers the alternator end of a generator set: stator, rotor, exciter, bearings, coupling disc, terminal box and the voltage regulation hardware. It converts engine rotation into electrical output at a held voltage and frequency. Bearing wear and insulation degradation are the two long-term concerns — a bearing that starts to rumble will eventually seize and take the rotor with it, while moisture and heat slowly break down winding insulation. Parts in this group are replaced when vibration rises, when insulation resistance falls on a megger test, or when output voltage becomes unstable under load.
System Notes — ELECTRICAL AND STARTING SYSTEM
The electrical and starting system covers the battery, starter motor, alternator, wiring harness, relays, switches and the instrument panel. It carries current from the batteries to the starter to crank the engine, and from the alternator back to keep the batteries charged. Because these machines work in dust, vibration and wide temperature swings, connectors corrode, harness insulation chafes against the frame, and starter solenoids burn out from repeated short cranks. Parts in this group are usually replaced on a symptom basis — slow cranking, a dash warning, lights that dim under load, or a no-start condition traced to an open circuit.
FAQ
Is 3N1645 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 3306.
Genuine vs OEM replacement — what is the difference?
Genuine CAT parts carry an anti-counterfeit label. OEM equivalents are built to the same specifications, bench-tested and supplied with full warranty at a better price.
Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a 12-month warranty.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
