21668 Nut Retainer | Genuine Volvo Penta Part
21668 Nut Retainer | Genuine Volvo Penta Part
Couldn't load pickup availability
Available on request — contact us
As an authorised Volvo Penta dealer we can source parts through channels not shown online, and check supersession and used options for you
Availability checked daily with Volvo Penta
✓ Authorised Volvo Penta Dealer · Genuine Volvo Penta parts · Ships Australia-wide
🔧 Product Description
A genuine Volvo Penta nut-retaining component with the valid five-digit part number 21668. It locks or captures the associated nut in its catalogued assembly so the fastener remains positioned during installation and operation.
⚙️ Key Features
- Genuine Volvo Penta legacy-format part number
- Designed to retain the associated nut
- Position-specific shape and material
- Prevents fastener rotation or loss where specified
- Direct replacement for the exact original retainer
- Engine type: Volvo Penta marine or industrial mechanical assembly
🔌 Function
Captures or locks the specified nut so it cannot rotate freely or fall from its installation position.
⚠️ Common Signs of Failure
- Nut movement or loosening
- Retainer cracking or loss of spring tension
- Incorrect nut alignment during assembly
- Fastener loss after retainer failure
🛠️ Service Notes
- Fit the retainer the right way round so the captive nut sits square to its hole and the fastener enters without cross-threading
- Renew retainers that are corroded or have lost their spring tension rather than reusing them; one that no longer grips lets the nut spin or drop out of reach behind a panel
- Clean the panel or flange and its hole before fitting, and treat corrosion at the same time — this is usually what killed the original
- Match the retainer to the fastener thread and size, and remember the retainer only locates and holds the nut, so do not rely on it to take a heavy tightening load
🔄 Supersession & Cross Reference
OEM / Related Numbers
- 3853403 - other Volvo Penta nut-retainer designs; not interchangeable without catalogue confirmation
- 3853306 - other Volvo Penta nut-retainer designs; not interchangeable without catalogue confirmation
- 21480060 - other Volvo Penta nut-retainer designs; not interchangeable without catalogue confirmation
- 21480062 - other Volvo Penta nut-retainer designs; not interchangeable without catalogue confirmation
- 20505959 - other Volvo Penta nut-retainer designs; not interchangeable without catalogue confirmation
- 3852009 - other Volvo Penta nut-retainer designs; not interchangeable without catalogue confirmation
📦 Condition
- Genuine Volvo Penta part
- Brand new
- Supplied in original or equivalent packaging
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
Share
