3900L | 1/4 inch Flat Plain Washer - Defender, Discovery 1, Range Rover Classic
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
Land Rover Part Number: 3900L - 1/4 inch Flat Plain Washer
3900L is a 1/4 inch flat plain washer. This plain washer is used to distribute the load from a fastener and protect the mating surface; it is fitted to fastenings on floor panels and door frame mounting brackets. Inspect for corrosion or deformation when removing fasteners and renew if damaged to maintain secure clamping.
Compatibility
- Defender (1987-2006)
- Discovery 1 (1989-1998) - From VIN FA393361 to WA799999
- Range Rover Classic (1986-1991) - To VIN HA610293
- Range Rover Classic (1992-1994) - From VIN JA610294
- Series 2 and 3
Frequently Asked Questions
The 3900L is a flat plain washer used with bolts and screws to spread load and reduce localized stress on sheet metal panels. It is typically fitted on floor panels and door frame mounting brackets; replace if corroded, flattened or otherwise damaged to preserve a secure joint.
| Model | Variant |
|---|---|
| Land Rover Defender (1987-2006) | Front Wing Assembly; Rear Forward Facing-Individual (110); Defender Black - Body And Wheels; Hand Throttle Control |
| Land Rover Discovery 1 (1989-1998) | Front Wing Assembly; Rear Door Frame (5 Door Station Wagon); Splash Shield - From VIN FA393361 to WA799999 |
| Land Rover Range Rover Classic (1986-1991) | CLASSIC Bonnet Prop & Lock; Rear Door Frame & Seals (4 Door Station Wagon) - To VIN HA610293 |
| Land Rover Range Rover Classic (1992-1994) | CLASSIC Rear Side Door Frame (4 Door Station Wagon); CLASSIC ECU-Fuel-To (V) LA647644; CLASSIC Carpets-Sill Finishers & Tread Plates - From VIN JA610294 |
| Land Rover Series II & III | Series 2 and 3 |
If you are unsure of compatibility with your vehicle, you can also confirm by checking against your V.I.N. Simply reach out to us with your V.I.N and desired part number via our Contact page or use our Finding Part Numbers page.
Inspect the washer whenever the fastener is removed and replace it if it is corroded, flattened or damaged to maintain secure clamping. If unsure, consult the vehicle workshop manual or a qualified technician.
- C8 products are usually supplied by Britpart.
- L8 products are genuine Land Rover parts.
- Z8 products are normally supplied by Allmakes.
All products and accessories available on LRDirect.com come with a 2-year warranty.