# 994522 Flange Lock Nut | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta flange lock nut weighing 0.048 kg and listed for 16 applications across the TAD, TWD and TADH series.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD1380-82GE
-   Volvo Penta TAD880-82GE
-   Volvo Penta TAD880-84VE
-   Volvo Penta TAD1180-83VE
-   Volvo Penta TAD580-83VE
-   Volvo Penta TAD1381-85VE
-   Volvo Penta TAD570-72VE
-   Volvo Penta TAD570-71VE-B
-   Volvo Penta TAD1670-72VE
-   Volvo Penta TAD1170-72VE
-   Volvo Penta TAD870-73VE
-   Volvo Penta TWD1682-83GE
-   Volvo Penta TWD1683VE
-   Volvo Penta TAD1384-85VE-IWP
-   Volvo Penta TADH880-82GE
-   Volvo Penta TADH880-84VE

-   **Engine Family:** TAD, TWD, TADH

## ⚙️ Key Features

-   0.048 kg
-   16 applications across TAD, TWD and TADH
-   Self-locking flanged nut
-   Larger of the two flange lock nuts here

## 🔌 Function

Clamps the joint from the nut end while resisting loosening under vibration, the flange spreading the load across the face.

## ⚠️ Common Signs of Failure

-   Nut working loose and the joint moving
-   Locking feature spinning free with no resistance
-   Flange embedded into or scoring the component face
-   Thread pulled, stripped or seized
-   Corrosion under the flange

## 🛠️ Service Notes

-   Fit a new lock nut rather than reusing the old one; the locking feature loses its grip after being run down once
-   994519 is the smaller flange lock nut at 0.016 kg, and flange screws 994390 and 994395 also publish 0.048 kg - order by part number, not by mass

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## Details

- **Price:** 3.75 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3.75 AUD | In stock |

## Images

- 994522 Flange Lock Nut | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/994522-flange-lock-nut-genuine-volvo-penta)
> Updated: 2026-10-10