Gold Plug Magnetic Sump Plug ½” x 19 TPI – 88G257 Equivalent – Classic Mini BMC A/B Series
£21.99
Magnetic sump plug manufactured to the same specification as the 88G257, designed for classic British vehicles using a ½” x 19 TPI thread.
Features a high-strength magnet to capture fine metal particles in the engine oil — a simple upgrade during servicing for Classic Mini, MG Midget, Austin Healey and other BMC A/B Series applications.
Thread Size: ½” x 19 TPI Whitworth thread.
Thread Pitch: 19 TPI
Thread Length (with washer):12 mm
Thread Length (with magnet):14 mm
Head Size:14 mm
Washer Included: Yes
Replacement Washer: SW-02
Fitment Note
Due to the age and variation of classic vehicles, we recommend checking the thread size of your existing drain plug before ordering. If you are unsure, please contact us with your vehicle details and we will be happy to help.
- Description
- Additional information
Description
Gold Plug Magnetic Sump Plug – ½” x 19 TPI – 88G257 Equivalent
This Gold Plug magnetic sump plug has been manufactured to match the specification of the 88G257X, making it a direct replacement for classic applications using a ½” x 19 TPI oil drain plug.
Designed for use on BMC A and B Series engines, including the Classic Mini and other classic British vehicles, this plug provides a simple upgrade over a standard drain plug by incorporating a high-strength magnet to capture fine metal particles in the engine oil.
Key Features
- ½” x 19 TPI thread
- Equivalent to 88G257 / 88G257X specification
- High-strength magnetic tip
- Direct replacement for standard sump plug
- Reusable – clean at each service
- Supplied complete with sealing washer
- Manufactured specifically for this hard-to-source application
Why Fit a Magnetic Sump Plug?
During normal engine operation, microscopic metal particles are produced as components wear over time. These particles circulate in the oil and are not always fully captured by the oil filter.
The magnetic tip on this plug attracts and holds ferrous metal debris, helping to reduce the amount of material circulating through the engine between oil changes.
At each service, the plug can be removed and cleaned, giving a simple visual indication of what has been collected.
Vehicle Compatibility
This plug is suitable for a range of classic British vehicles using a ½” x 19 TPI thread, including:
Engine Oil Sump Applications
- Classic Mini
- MG MGA
- MG MGB
- Morris Minor
- Austin Healey Sprite (Mk I – IV, 1098cc & 1275cc)
- MG Midget (Mk I – III, 1098cc & 1275cc)
Fitment Note
Due to the age and variation of classic vehicles, we recommend checking the thread size of your existing drain plug before ordering. If you are unsure, please contact us with your vehicle details and we will be happy to help
Additional information
| Thread Diameter | 1/2" |
|---|---|
| Thread Pitch | 19 TPI Whitworth |
| Thread Length | 12 mm |
| Thread Length (inc magnet) | 14 mm |
| Head Size | 14 mm |















