K71-187-00 - Service Kit – For Fortress Bolt-On Oil Cap – For 9K–12K Hubs | DXT

K71-187-00 - Service Kit – For Fortress Bolt-On Oil Cap – For 9K–12K Hubs | DXT
This complete service kit is designed for maintaining and restoring Dexter Fortress Bolt-On aluminum oil caps used on 9,000–12,000 lb axles. Whether you're replacing worn components or performing preventive maintenance, this OEM-compatible kit includes all essential hardware for resealing and securing your cap assembly.
Detailed Information:
| Axle Rating | 9,000–12,000 lbs |
|---|---|
| Application | Service Kit for Fortress Bolt-On Cap |
| Compatible Cap | Dexter 021-259-00 / K21-259-00 |
| Mount Style | Bolt-On |
Fitting:
Specifically engineered for Dexter Fortress bolt-on aluminum oil caps used on 9K–12K medium-duty trailer axles. Direct replacement for all wear components on the K21-259-00 oil cap assembly. No modifications required for installation.
Features:
- Complete Maintenance Kit: Includes gaskets, oil fill plugs, rubber logo plugs, and bolt/washer hardware.
- Direct-Fit Replacements: Designed to match Dexter OEM specifications for a perfect fit.
- Built for Service: All components are made from durable, heavy-duty materials.
- Fast Installation: Everything you need to re-seal or rebuild your Fortress bolt-on cap in one kit.
Kit Contents (K71-187-00):
- (2) Dexter Logo Rubber Plug – Part #085-029-00
- (2) Oil Fill Plug – Part #007-695-00
- (2) Bolt-On Oil Cap Gasket – Part #010-500-00
- (12) Bolt/Lock Washers – Part #007-684-00
Interchangeable Part Numbers:
- K71-187-00
Product Overview:
The Fortress Bolt-On Cap Service Kit is the go-to solution for maintaining Dexter aluminum oil caps on 9K–12K axles. Ideal for fleet service or in-field repairs, this kit ensures your cap remains sealed, secure, and ready for extended use in oil bath axle systems.
- Product type: Oil & Dust Caps

