Adapter, -8 ORB Male » M18x1.5 Male, BLK
Quick Overview
- Adapter, -8 ORB male to M18x1.5 metric male
- FKM (Viton) O-ring on the ORB end
- Aluminum crush washer for the metric end
- No tape or sealant needed
- E85 compatible, black anodized 6061-T6 aluminum
Show More
$4.50
per EACH (USD)Adapter, -8 AN ORB Male to M18x1.5 Metric Male, Black
Connects a -8 ORB port to a metric M18x1.5 female fitting or port.
The Racetronix ADF-8RM1815MR has a -8 AN O-ring boss (ORB) male on one end and an M18x1.5 metric male thread on the other. It joins an ORB port and a metric female fitting or port. The ORB end has an FKM (Viton) O-ring, and the metric end comes with an aluminum crush washer.
Key features
- -8 AN ORB male with FKM (Viton) O-ring.
- M18x1.5 metric male, aluminum crush washer included.
- Straight one-piece body.
- E85 compatible.
- 6061-T6 aluminum, black anodized.
The ORB end seals on its FKM (Viton) O-ring against the port face, not on the threads. The metric end seals on the included aluminum crush washer against the port face. Do not reuse a crush washer that is scored or heavily compressed, and do not use tape or sealant on either end.
Specifications
| Part number | ADF-8RM1815MR |
| ORB end | -8 AN ORB male (SAE J1926), 3/4"-16 thread, FKM (Viton) O-ring |
| Metric end | M18x1.5 male (18 mm diameter, 1.5 mm pitch), aluminum crush washer included |
| Material | 6061-T6 aluminum, black anodized |
| Fuel compatibility | Gasoline and E85 |
Lookup chart
Every part in this series. This part is highlighted. Click a column heading to sort by it; click again to reverse. On a phone, swipe the chart sideways.
| Part number | AN ORB male | Metric male |
|---|---|---|
| ADF-6RM12125MR | -6 ORB | M12x1.25 |
| ADF-6RM1215MR | -6 ORB | M12x1.5 |
| ADF-6RM1415MR | -6 ORB | M14x1.5 |
| ADF-6RM1615MR | -6 ORB | M16x1.5 |
| ADF-6RM1815MR | -6 ORB | M18x1.5 |
| ADF-8RM1215MR | -8 ORB | M12x1.5 |
| ADF-8RM1415MR | -8 ORB | M14x1.5 |
| ADF-8RM1615MR | -8 ORB | M16x1.5 |
| ADF-8RM1815MR | -8 ORB | M18x1.5 |
Frequently asked questions
How do I check the metric size?
Measure the thread diameter (18 mm) and pitch (1.5 mm) with a thread gauge.
Can I reuse the crush washer?
Not if it is scored or heavily compressed. Fit a new one.
Is it E85 compatible?
Yes. It is made from 6061-T6 aluminum and black anodized, and works with gasoline and E85.
Questions and support
Not sure which fitting your build needs? Email [email protected] before you order.
Racetronix provides technical support to verified customers through our support forum, not by phone or email. Please request forum access when you place your order so your account is approved before your parts arrive. The forum is moderated, open 24/7, and holds a knowledge base going back to 1999.






