# 966834 Hollow Screw | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta hollow screw weighing 0.007 kg and listed for 59 applications across the TD, TWD, TMD, TID, TAMD and TAD series. It supersedes part number 74034.

## 🚤 Compatibility

-   **Engine Family:** TD, TWD, TMD, TID, TAMD, TAD

Full model list at the end of this description.

## ⚙️ Key Features

-   0.007 kg
-   Listed for 59 applications across six engine series
-   Supersedes 74034
-   Drilled through to carry flow while clamping the union
-   L=24mm (Volvo assembly listing)
-   Quantity varies by assembly, most commonly one
-   Also supersedes Volvo part numbers 421206, 422588 and 423337

## 🔌 Function

Clamps a banjo union to its port while its drilled centre carries the fluid through the joint.

## ⚠️ Common Signs of Failure

-   Union weeping after the system comes up to pressure
-   Sealing washers flattened, hardened or reused
-   Through-drilling silted, coked or blocked
-   Thread picked up or the screw found loose

## 🛠️ Service Notes

-   Hollow screw 966821 is the M24 listing here, so match the thread to the port rather than ordering on the name alone
-   Renew both sealing washers and check the drilling is clear before refitting

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   966834 → Supersedes 74034 → Supersedes 240325

### OEM / Related Numbers

-   74034 earlier number superseded by this part

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta TAMD122A, TAMD122A/C, TAMD122D, TAMD122P-A, TAMD122P-B, TAMD122P-C
-   Volvo Penta TAMD162C-C, TAMD162A, TAMD162B, TAMD162C, TAMD162C-B
-   Volvo Penta TD121G-87, TD121GP, TD121GPB, TD121CHC, TD121CRC
-   Volvo Penta TID162AG, TID162AGP, TID162AP, TID162APB
-   Volvo Penta TWD1210G, TWD1210P, TWD1210PB, TWD1210V
-   Volvo Penta TAMD165A, TAMD165C, TAMD165P
-   Volvo Penta TWD1211V, TWD1211P, TWD1211G
-   Volvo Penta TAD120BHC, TAD120CHC
-   Volvo Penta TAD1230G, TAD1230V
-   Volvo Penta TAD1630G, TAD1630GE
-   Volvo Penta TAD1631GE, TAD1631G
-   Volvo Penta TAMD163A-A, TAMD163P-A
-   Volvo Penta TD120BHC, TD120BRC
-   Volvo Penta TWD1230ME, TWD1230VE
-   Volvo Penta TWD1630G, TWD1630V
-   Volvo Penta TAD1170-72VE
-   Volvo Penta TAD121CHC
-   Volvo Penta TAD1231GE
-   Volvo Penta TAD1232GE
-   Volvo Penta TAMD120B
-   Volvo Penta TAMD121D
-   Volvo Penta TD1210G
-   Volvo Penta TD164KAE
-   Volvo Penta TMD120B
-   Volvo Penta TMD121C
-   Volvo Penta TMD122A
-   Volvo Penta TWD1231VE
-   Volvo Penta TWD1620G

## Details

- **Price:** 31.37 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 31.37 AUD | In stock |

## Images

- 966834 Hollow Screw | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/966834-hollow-screw-genuine-volvo-penta)
> Updated: 2026-09-06