- Threaded plugs for O-ring Boss fittings are made of high-density polyethylene and are ideal for keeping moisture and debris from threaded ports.
- Threaded plugs will seal low pressure with light finger tightening
| Type | Plug |
| Style | Threaded |
| Size | 9/16" - 18 |
| Material | Plastic |
| Color | Red |
| Dash Size | 6 |
