Volvo Penta Hex Nut 3889613 – OEM Marine Fastener
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Volvo Penta Hex Nut – Part #3889613
This genuine OEM hex nut is manufactured to Volvo Penta specifications for use in marine engine and sterndrive assemblies. Precision-threaded for correct fit and torque retention, and built from corrosion-resistant material suited to the demands of the marine environment. Sold individually.
Part Details
- Part Number: 3889613
- Brand: Volvo Penta
- Product Type: Hex Nut
- System: Engine & Drivetrain Fastening
- OEM / Aftermarket: OEM (Genuine Volvo Penta)
- Quantity: Sold individually (1 nut per order)
Compatible Applications
- Volvo Penta marine engine and sterndrive assemblies (confirm position via parts diagram)
This is a common OEM fastener used across multiple Volvo Penta engine and drive assemblies. Always confirm the correct part number and diagram position for your specific application before ordering. Thread pitch, diameter, and seating surface vary by position.
Verify your application using the Volvo Penta parts catalog: Volvo Penta Part Reference 3889613
Dimensions & Weight
- Packaged Weight: Approx. 0.05 kg
- Refer to the Volvo Penta parts diagram for thread size, pitch, and torque specification applicable to your assembly position
Installation Notes
- Always follow the torque specification in the Volvo Penta service manual for the assembly position where this nut is used
- Use a calibrated torque wrench — do not over-tighten or estimate by feel
- Inspect the mating thread on the stud or bolt before installation; replace any component with damaged or corroded threads
- Apply thread-locking compound or anti-seize only where explicitly called for in the service manual for that position
Parts Desk Insights
Best use case: This nut is the correct choice when you need a factory-spec replacement fastener for a specific Volvo Penta assembly position — particularly where corrosion, overtorque, or thread damage has affected the original. Having the correct OEM fastener matters in applications where torque value and material grade are critical to safety or sealing.
Common issue: Customers occasionally order this nut by appearance or approximate thread size rather than confirming by parts diagram. Volvo Penta uses several nut sizes and grades across their engine and drive lines, and substituting the wrong fastener at a critical position can cause joint failure or void warranty. Always verify by diagram position and part number before ordering.
Technical FAQ
- What thread size is this nut? Thread specifications are defined by the assembly position. Refer to the Volvo Penta parts diagram and service manual for the thread size and torque value applicable to your engine or drive.
- Can I substitute a standard hardware-store nut? In most marine engine and drive applications, Volvo Penta recommends using OEM fasteners where specified — particularly at critical joints. Material grade and dimensional tolerances are matched to the assembly design.
- How many do I need? Quantity depends on the assembly being serviced. Check the parts diagram for the quantity shown at your specific diagram position.
Related Parts
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.