Description
Rig Tough 6405002 is a 4″ lever-style, non-locking aluminum diesel fuel cap with a pressure-relief vent and tether for Peterbilt fuel tanks. It replaces Peterbilt OEM 11-04859-100 and HD Fleet FTA-C-68-P, fitting the 4″ SCH 40/80 fill neck used across most modern Peterbilt models from 1972 onward.
Specifications
| Manufacturer | Rig Tough |
|---|---|
| Part Number | 6405002 |
| Part Type | Diesel fuel cap, lever style, non-locking, vented |
| Material | Aluminum |
| Cap Diameter | 4″ (fits 4″ SCH 40/80 fill neck) |
| Tether | ~8″ chain with bail |
| Vent | Pressure-relief; tank must be vented |
Cross References
This fuel cap replaces or is equivalent to the following part numbers:
- Peterbilt: 11-04859-100, 11-04859-100-2
- HD Fleet Fuel Caps: FTA-C-68-P
- Also known as: S-20270, 572.1014
Applications
This fuel cap fits 4″ lever-neck Peterbilt fuel tanks on the following models:
- Peterbilt 320, 325, 330, 335, 337, 340, 348 (medium-duty)
- Peterbilt 357, 359, 362, 365, 367, 377, 378, 379, 384, 385, 386, 387, 388, 389 (heavy-duty)
- Peterbilt 567, 579, 587 (newer heavy-duty)
Verify the fill-neck diameter and lever style on your tank before ordering. Replace the cap O-ring whenever you renew the cap to ensure a proper vent and seal.




